Just learning it is not enough though... you should understand that only light that went into the prism can come out of the other side. Therefore if only red light goes in - only red can come out!

Digitalzoom

White light is made up of a spectrum (range of wave frequencies). This can be dispersed by a prism to show us all of the colours present in white light.

Telephoto lens

Our Standard Zoom Lenses stand out in the photography world for their balance of quality and versatility. These lenses are designed to offer photographers the flexibility to capture a wide range of subjects and scenes without changing lenses. This convenience can be particularly helpful for fast-paced and dynamic situations where time is of the essence, or when you're wanting to minimise the gear you're carrying. Whether you’re shooting landscapes, portraits, or spontaneous travel moments, our zoom lenses are equipped to capture your vision with precision and clarity.

If pure yellow light goes in only pure yellow (single wavelength yellow - such as is found in a sodium light source) will come out - but if yellow light made up of red and green goes in, then the red and green will separate.

Prime lens

Canon Photographer Jenn Cooper explains everything from focal lengths and aperture values to the different types of available lenses and when to use each one.

The great thing about street photography is you can use almost any lens, depending on the type of look you’re going for and zoom lenses are a popular choice. Learn more on our street photography hub page.

General zoom lenses are perfect for travellers. Get more tips and tricks from our community of photographers on our travel hub.

zoomlens中文

Therefore you should know the primary and secondary colours of light and the colours that make up white light: red, orange, yellow, green, blue, indigo, violet.

If you pass light though a prism it is dispersed into its constituent colours. this is becase the degree of refraction that a wavelength of light undergoes depends upon its frequency. The higher the frequency the more it refracted. Therefore blue light is refracted more than red light.

You must have the light bend the correct way at each optical bounday and you must have the degree to which they bend correct too.