Most questions will ask you to calculate the intensity of the light wave after it has passed through one of these filters, which can be done by multiplying the original intensity by the cos of the angle the filter from perpendicular to the floor. The formula for this is provided in the formula booklet, with the new and original intensity denoted by I and I0 respectively.

What is polarisation of lightin physics

GCC offers four different focal lenses for CO2 laser engravers namely the 1.5”, 2.0”, 2.5”, and 4.0” for different applications.  The number description, 1.5”, 2.0”, 2.5”, and 4.0” signifies the distance of where passed through beam will converge.  For example, when a beam of light passes through a 2.0” focus lens, the light beam will converge at a 2.0” distance resulting in a concentration of energy at that spot.

What is polarisation of lightclass 12

When something emits light, the waves produced usually have their oscillation moving at all different angles. You can have some oscillating left and right, up and down, at a 45-degree angle, or any angle imaginable. This is what we call unpolarized light, which means that all the light waves have different planes of oscillation. Polarized light is when light passes through a filter and the waves of light are limited to one plane of movement and the rest is absorbed, leaving polarized light to only have one plane of oscillation. The filter has tiny gaps in them that are all parallel to one another, as such only waves oscillating in parallel to the filter will pass through. This will decrease the intensity of the light passing through (intensity being the amount of light present), decreasing it dependant on the angle of the filter and if the light is polarised beforehand.

The resulting spot size from the different focus lens are also different and the following chart shows the different spot sizes achieved from the different lenses.