This video tutorial explains the refraction of light, a phenomenon where light bends when passing from one medium to another. It covers Snell's Law, which is used to calculate the angle of refraction, and discusses how the speed of light changes in different media. The tutorial also explores the concepts of critical angle and total internal reflection, providing examples and calculations to enhance understanding.

What happens to a light ray when it strikes the boundary between two different media?

• It only reflects.

• It can reflect, refract, or be absorbed.

• It always gets absorbed.

• It only refracts.

According to Snell's Law, what is the relationship between the angles of incidence and refraction?

• They are related through the indices of refraction of the media.

• They are always complementary.

• They are unrelated.

• They are always equal.

What is the approximate index of refraction for water?

• 2.4

• 1.33

• 1.0

• 0.75

How does the speed of light change when it moves from air to water?

• It remains the same.

• It becomes zero.

• It decreases.

• It increases.

What is the speed of light in a vacuum?

• 4 x 10^8 meters per second

• 3 x 10^8 meters per second

• 2.256 x 10^8 meters per second

• 1.5 x 10^8 meters per second

What happens to a light ray when it moves from a medium with a high index of refraction to one with a low index?

• It bends towards the normal line.

• It bends away from the normal line.

• It travels in a straight line.

• It gets absorbed completely.

What is the critical angle?

• The angle at which total internal reflection occurs.

• The angle at which light is completely absorbed.

• The angle of refraction when the incident angle is 90 degrees.

• The angle of incidence when the refracted angle is 90 degrees.

What phenomenon occurs when the angle of incidence exceeds the critical angle?

• Partial reflection

• Total internal reflection

• Complete absorption

• No refraction

What is the index of refraction for a pure vacuum?

• 1.33

• 2.4

• 1.0

• 0.0

What is the range of possible values for the incident angle?

• 45 to 90 degrees

• 0 to 45 degrees

• 90 to 180 degrees

• 0 to 90 degrees