Lenses and Refraction Flashcard Review

Front

What is refraction?

Back

Refraction is the bending of light as it passes from one medium to another due to a change in its speed.

Front

What causes light to change direction when it enters a different medium?

Back

Light changes direction due to refraction.

Front

True or False: Refraction causes objects to appear broken when viewed through water.

Back

True

Front

What happens to light when it travels from a low refractive index to a high refractive index?

Back

It bends towards the normal.

Front

What is the role of the cornea in the eye?

Back

The cornea is the transparent front part of the eye that helps to focus light.

Front

Which of the following is NOT a device that uses a lens: binoculars, glasses, camera, or mirror?

Back

Mirror.

Front

What is the normal line in the context of refraction?

Back

The normal line is an imaginary line perpendicular to the surface at the point of incidence.

Front

What is the refractive index?

Back

The refractive index is a measure of how much light slows down in a medium compared to its speed in a vacuum.

Front

How does light behave when it passes from air into water?

Back

Light slows down and bends towards the normal.

Front

What is total internal reflection?

Back

Total internal reflection occurs when light hits a boundary at an angle greater than the critical angle, causing it to reflect entirely back into the medium.