1. When a glass plate with a refractive index of 1.3 is put in the path of one of the beams in Young's double slit experiment, the fringes are displaced by a distance $x$. The fringe shift is $(5/2)x$ when this plate is replaced by another plate of the same thickness. The second plate's refractive index will be_______.

If someone wants to score well and achieve a better rank in JEE competitive exams, then it is very important to prepare for this chapter. Moreover, the weightage of this chapter is more as compared to the others; hence it has to be given more importance.

Nanlite Halo 10B Dimmable Bicolour USB 10in LED Ring Light. Provides an attractive, soft, near-shadowless light quality with interesting, ring-shaped ...

We must practise previous years’ questions in order to score well and become familiar with the exam's difficulty level. It not only enhances our self-esteem but also exposes us to areas where we may need practice. Solving previous 10 to 15 years’ question papers can help you better comprehend a concept and can also give you an indication of how many times a concept or topic has been repeated in the test. You can prepare for physics chapters and measure JEE notes by practising previous years’ questions, which will turn out to be beneficial.

The ACT-2FO Autofocusing Autocollimator is a high-accuracy measurement instrument capable of resolution down to Electronic Autocollimatorfractions of an ...

History ofoptics

Magnifying power ($m$) of a simple microscope is defined as the ratio of angles subtended by the image and the object on the eye, when both are at the least distance of distinct vision($d$) from the eye. It is given as

Rare Metals provides a forum for publishing original articles, letters, reviews, highlights, perspectives, etc., which have high impact potential and/or ...

Explore an array of resources in the JEE Main Physics Study and Practice Materials section. Our practice materials offer a wide variety of questions, comprehensive solutions, and a realistic test experience to elevate your preparation for the JEE Main exam. These tools are indispensable for self-assessment, boosting confidence, and refining problem-solving abilities, guaranteeing your readiness for the test. Explore the links below to enrich your Physics preparation.

The resolving power of optical instruments like microscopes and telescopes is a critical factor. It determines their ability to distinguish two closely spaced objects. The resolving power of a microscope or a telescope can be defined as:

Optical

Astronomical telescope consists of two lenses i.e, an objective lens which is of large focal length($f_o$) and an eyepiece which has a small focal length($f_e$).

According to the Law of Malus, when a beam of completely polarised light is incident on an analyser, the resultant intensity of light ($I$) transmitted from the analyser varies directly as the square of the cosine of the angle ($\theta$) between plane of transmission of analyser and polariser.

optics中文

The dispersive power of a prism is solely determined by the type of prism material. However, angular dispersion and mean deviation, both depend on angle of prism in addition to the nature of material of the prism.

Reflecting type of telescope consists of a parabolic concave reflector with a narrow hole at the centre and secondary convex mirror.

It is given that the rays are falling normally on face AB. If the angle of incidence is greater than C, then the rays will suffer total internal reflection. Thus, if $\mu$ is greater than 1.414 then the colour will suffer total internal reflection.

For interference to occur, the sources of light must be coherent, meaning they have a constant phase relationship. Coherent sources are essential for sustained interference patterns. These patterns play a crucial role in applications such as interferometry and the study of thin films.

Compound microscope consists of two lenses co-axially at the free end of a tube, at a suitable fixed distance from each other.

From the above relation, we can conclude that the central maxima of $5^{th}$ bright fringe of $\lambda_1$ coincides with the $6^{th}$ bright fringe of $\lambda_2$.

The path difference of $\lambda$ has introduced the phase difference of $\beta$. Therefore, a path difference of $(\mu-1)t$ that will introduce a shift of $x$ is given as

2. Find the minimum thickness of a film which will strongly reflect the light of wavelength 589 nm. The refractive index of the material of the film is 1.25.

Optics is like the magic of light and how it interacts with the world. It helps us understand how we see things, how lenses work, and how rainbows form. Imagine it as the science of understanding light and its tricks, like a magician revealing the secrets behind the illusions. In your JEE studies, optics is an essential topic that helps you see the world through the eyes of science.

The process of redistribution of light energy in a medium caused by the superposition of light waves from two coherent sources is known as interference of light.

The phenomenon of light dispersion is the splitting of a white light beam into its constituent colours when it passes through a prism.

Key point: The concept of total internal reflection and the relation between refractive index and wavelength of light are the important keys to solve this problem.

1. In a single slit diffraction experiment, the first minimum for red light (660 nm) coincides with the first maximum for some other wavelength $\lambda$. Calculate $\lambda$.

The mirror formula is a relationship between the mirror's focal length and the distance between the object and image from the mirror.

To solve this problem, we have to use the relation between the thickness of a plate, path difference and its refractive index. Also, we have to use the relation of fringe width.

Waveoptics

The relation between the path difference($\Delta$), the thickness of the plate ($t$) and its refractive index ($\mu$) is given as

If a microscope has only one ocular lens it is called a monocular and if it has two ocular lenses it is called a binocular. Eyepiece Tube. Connects the ...

Here, you'll find a comprehensive collection of study resources for Optics designed to help you excel in your JEE Main preparation. These materials cover various topics, providing you with a range of valuable content to support your studies. Simply click on the links below to access the study materials of Optics and enhance your preparation for this challenging exam.

optics期刊

Key point: The concept of interference of light and its conditions for bright fringes is important to solve this problem.

The children of P.S. 19Q, The Marino Jeantet School, are empowered to achieve their highest levels of personal academic excellence.  Our goal is to instill habits in our students that will foster autonomy and help them become the leaders of today and tomorrow.

Combination of Thin Lenses in Contact: When two or more thin lenses are in contact, they can be treated as a single lens. The power of the combination is the sum of the individual powers of the lenses.

An active beam combining system coherently combines optical beams emitted by semiconductor laser gain elements in an external resonant cavity configuration. A ...

Optica

Diffraction is a phenomenon where light waves bend around obstacles and spread out. When light passes through a single slit, it diffracts, leading to the formation of a diffraction pattern. The width of the central maximum in a single-slit diffraction pattern can be determined using the formula:

2. The slits in Young's double-slit experiment are spaced by 0.3 mm, and the screen is 130 cm distant. To obtain interference fringes on the screen, a laser beam with two wavelengths, 600 nm and 500 nm, is utilised. Calculate the shortest distance between the shared centre maxima and the point where the bright fringes caused by both wavelengths coincide.

Modern optics: Modern optics is a branch of optics that deals with the interaction of light with matter at the atomic and subatomic level. It includes topics such as lasers, fiber optics, and holography.

Product information for High Efficiency Fresnel Lens Spotlight Led Leonardo 10 manufactured by DeSisti Lighting. Provided by AV-iQ.

A lens is a section of a transparent refracting material that is joined by two spherical surfaces or one spherical surface and one plane surface. There are types of lenses:

Hex Key Wrench 5/64″ Titanium · MR Conditional, good for 3T · Non-Magnetic · Titanium · Corrosive resistant · Size info under Additional Information ...

The children of P.S. 19Q, The Marino Jeantet School, are empowered to achieve their highest levels of personal academic excellence.  Our goal is to instill habits in our students that will foster autonomy and help them become the leaders of today and tomorrow.

Located in the Institute of Photonics and Quantum Sciences at Heriot-Watt University, our research concerns the development of versatile ultrafast laser systems ...

Lens maker’s formula is a relation that connects focal length($f$) of the lens to radii of curvature ($R_1$ and $R_2$) of the two surfaces of the lens and refractive index($\mu$) of the material of the lens. It is written as

Now, let's move on to the important concepts and formulae related to JEE and JEE Main exams along with a few solved examples.

According to the question, it is given that white light is incident on the glass air interface from glass to air and green light suffers total internal reflection. We know that white light consists of seven bands of colours i.e, VIBGYOR whose wavelength increases as we go from violet to red colour.

Every particle on the given wavefront acts as a fresh source of new disturbance, called secondary wavelets, which travels in all directions with the velocity of light in the medium.

Here, $n$ = 1,2,3……an integer, $a$ = width of the aperture, $\theta$ = angle made by secondary waves while travelling and $\lambda$ = wavelength of light.

Power of a lens ($P$) is defined as the ability of the lens to converge a beam of light falling on the lens and it is measured as

In order to solve this problem, we have to apply the concept of central maxima in interference pattern. Let $x$ be the distance between the centre maxima and the point at which the bright fringes caused by both wavelengths coincide.

Here, $f_o$= focal length of objective lens, $f_e$= focal length of the eye-piece, $L$= length of the microscope tube and $d$= least distance of distinct vision.

Optics is perhaps one of the most often questioned topics in JEE main, particularly in JEE Advanced. So, certainly, it is heavily weighted in the JEE examinations. Every year, approximately 3-4 questions are asked from this chapter, which leads to approximately 4-5 % weightage.

A simple microscope is used for observing magnified images of tiny objects and it consists of a converging lens of small focal length.

Wave optics: Wave optics is a physical approach to understanding the propagation of light. It is based on the principle that light is a wave, and that it can interfere and diffract.

2.A beam of light consisting of red, green and blue colours is incident on a right angled prism, as shown in figure. The refractive indices of the material of the prism for the above red, green and blue wavelengths are 1.39, 1.44 and 1.47, respectively. The prism will

Optics

At any instant, a surface encountering these secondary wavelets tangentially in the forward direction yields the new wavefront at that instant. This is referred to as a secondary wave front.

Polarization is the phenomenon where light waves vibrate in a specific direction. Brewster's Law helps us understand the angle at which polarized light is reflected from a surface. It is expressed as:

1. A beam of white light is incident on the glass air interface from glass to air such that green light just suffers total internal reflection. The colours of the light which will come out to air are

Therefore, the wavelengths of yellow, orange and red colour light are greater than the wavelength of green colour light, while the wavelengths of violet, indigo and blue are lesser than green colour light.

A prism is a triangular optical element that refracts light, causing it to deviate. The deviation is different for different colors due to dispersion, and this phenomenon is key in understanding how rainbows form and how prisms split white light into its constituent colors.

AMOphysics

For red colour, the refractive index is 1.39 which is less than 1.414 but for the green and blue colurs, the refractive indices are 1.44 and 1.47, which are more than the 1.414. Hence, red colour will emerge out of the prism while green and blue colours suffer total internal reflection. Hence, option a is correct.

20241017 — However, the usage of aspheric lenses has been around for quite some time as well, and their purpose is to increase the depth of focus of the ...

Hence, $C$ will be greater for yellow, orange and red colour light. Therefore, these colour lights will come into the air from the glass.

In this article, we'll dive into the fascinating world of optics, a crucial chapter in JEE Main physics. We'll explore the fundamental concepts and tackle questions related to optics. Discover the secrets behind the behavior of light, reflection, refraction, and the wonders of lenses and mirrors. You'll find all you need in one convenient place. With free downloadable PDFs, students can easily grasp these concepts and problem-solving techniques. This resource will be a valuable asset for your JEE Main preparation, helping you excel in your exams.

How Nimble Empowers Customers to Thrive. Discover the power of Nimble CRM through the lens of our satisfied customers – take Nimble for a spin yourself. Try ...

The phenomenon of restricting the vibration of light in a particular direction, perpendicular to the direction of the wave motion, is called polarisation of light.

The phenomenon of total internal reflection is the reflection of light into a denser medium from an interface of this denser medium and a rarer medium.

Ray optics: Ray optics is a geometrical approach to understanding the propagation of light. It is based on the principle that light travels in straight lines, and that it can be reflected and refracted at interfaces between different materials.