Parallel rays

a) What type of lens is shown in the diagram on the right? What will happen to the parallel rays of light? Show by completing the ray diagram. b) Your eye contains a convex lens. Why is it unwise to look at the sun?

Fill in the following blanks with suitable words. (a) Parallele rays of light are reflected by a concave mirror to a point called the…………… (b) The focal length of a concave mirror is the distance from the …………to the mirror. ( c) A concave mirror................rays of light wheres a convex mirror..............rays of light. (d) For a convex mirror, parallel rays of light appear to diverge from a point called the ...........................

A beam of monochromatic parallel rays is incident normally on a narrow slit. A diffraction fringe pattern is formed on a screen, placed normally to the incident rays. Find the phase difference between two rays coming from two ends of the slit at the first minimum formed in the diffraction fringe.

Rays Not Parallel To Principle Axis

Find the equivalent focal length of the system for paraxal rays parallel to axis

Find the equivalent focal length of the system for paraxal rays parallel to axis

Find distance on focal plane where parallel and paraxial rays which are not parallel to optic axis, meet after reflection.

Show with a neat diagram, the direction of the reflected ray in case of a concave mirror if the incident ray is : Parallel to the principal axis,

When rays parallel to the principal axis strikes a concex lens, the refracted rays are __________ .

Discuss refraction through a glass slab and show that emergent ray is parallel to incident ray but displaced?