When light is incident from air on a rectangular glass slab and then the angle of incidence willl be:
What is focal length of a lens of power 2.5 D ?
Why is there no dispersion of light refracted through a rectangular glass slab ?
A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length 10 cm. What is the focal length and power of the combination ?
Amol performed an experiment on tracing the path of a ray of light passing through a rectangular glass slab. When ray of light enters from air to glass slab, he observed angle I =45^(@) . The angle of refraction must be