Question

How can two right-angled prisms be used in a periscope?

Options

• They can change the path of light and help a person see over obstacles.

• They can transmit internet data with low transmission loss.

• They can make a hot road appear wet by changing the air density.

• They can coat the reflecting surface to prevent degradation.

Answer 1

Two right-angled prisms can change the path of light in a periscope. This helps a person see over obstacles.