textbook exercises

Explain with diagram how refraction of incident light takes place from denser to rarer medium.

Explain with diagram how refraction of incident light takes place from normal to the surface separating the two media.

A concave mirror produces three times magnified real image of an object placed at $7 \mathrm{cm}$ in front of it. Where is the image located?

Light enters from air into a glass plate having refractive index $1.5$. What is the speed of light in glass?

The speed of light in water is $2.25\times {10}^8 \mathrm{m}/\mathrm{s}$. If the speed of light in vacuum is $3\times {10}^8 \mathrm{m}/\mathrm{s}$, calculate the refractive index of water.

Light ray emerges from water into air. Draw a ray diagram indicating the change in its path in water.

When a ray of light passes from air into glass, is the angle of refraction greater than or less than the angle of incidence?

What do you conclude about the speed of light in diamond if the refractive index of diamond is $2.41$?