Major 1 Flashcards
Types Of Lenses
1.Concave lens (diverging)
2.Convex lens (converging)
What does refractive power of lens depends on?
It depends on not only the shape of the lens but also on the indices of reaction of lens material and the surrounding
How the refractive power of lens can be altered?
one or both surfaces of lens be in contact with water or some other liquid
What is aberration?
Aberration is intrinsic defects of real lenses that produce distortions
Chromatic aberration
The focusing of light of different colours at different location
Spherical aberration
The blurring image due to rays that transverse a lens far from its optic axis
Definition of light
Light is the electromagnetic radiation whose wavelength falls in the range 400-700nm
Define light direction of polarization
The direction of the oscillating electric field
Which light is called unpolarized ?
Is light wave that is vibrating in more than one plane
How to see whether light from a given source is polarized?
Polarized light emerges with one half the intensity and with vibrations in a single plane when transmitted through a polaroid filter
Which light is called partially polarized ?
Light which scattered by small particles or air molecules
How to see whether light from a given source is partially polarized?
If the second polarizing filter is rotated,only the component of the light parallel.The reflected light is patrially polarized.
