Basic Terms in Ray Optics

A man of height $h$ is walking away from a street lamp with a constant speed $v$. The height of the street lamp is $3h$. The rate at which of the length of the man's shadow is increasing when he is at a distance $10h$ from the base of the street lamp is:

Sun rays entering through a small triangular and a circular hole from the roof of a room. What will be the shapes of the patch of the light on the surface of the floor?

What is the first theorem of light?

The thickness of a glass plate is measured to be $2.17 \mathrm{mm},2.17 \mathrm{mm}$ and $2.18 \mathrm{mm}$ at three different places. Find the average thickness of the plate from this data. (in $\mathrm{mm}$)

(Answer approximately to three significant figures)

_____ optics is also called Geometrical optics.

Is light a ray or a wave?

What is difference between ray of light and beam of light?

What do we call a single ray of light?

Who produced Ray of Light by Madonna?

Define geometrical optics and the laws of reflection in geometric optics

The phenomenon which is studied in geometrical optics is called

How ray optics is different from wave optics?

A passenger in an aeroplane shall

A beam of light is generated by a laser is called-

A ray model is very useful while studying the 

Define a ray of light.

Which of the following is the correct formula of speed of light in a medium(refractive index $\mu$)?

Which of the following phenomenon is studied under ray optics?

Differentiate between ray optics and wave optics.