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

Do light waves require a medium to travel?

Back

No, light waves can travel through a vacuum.

Front

What type of lens is used to converge light rays?

Back

A converging lens.

Front

What type of lens is used to diverge light rays?

Back

A diverging lens.

Front

What is the angle of incidence?

Back

The angle between the incident ray and the normal line at the point of incidence.

Front

What is the angle of refraction?

Back

The angle between the refracted ray and the normal line at the point of refraction.

Front

What type of image is formed by a converging lens when the object is beyond the focal point?

Back

A real and inverted image.

Front

What type of image is formed by a diverging lens?

Back

A virtual and upright image.

Front

What happens to light rays when they pass from a denser medium to a less dense medium?

Back

They bend away from the normal.

Front

What is total internal reflection?

Back

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