Ray diagrams

The video tutorial explores the concepts of reflection and refraction using ray diagrams. It explains how light behaves when it encounters different surfaces, detailing the angles of incidence and reflection. The tutorial also covers how light changes direction when passing through different media, known as refraction, and the associated angles. Examples include how water appears shallower and how a straw looks bent in a glass of water. The video concludes by summarizing the key points about reflection and refraction.

What happens to light when it hits a smooth surface?

• It reflects in a regular pattern.

• It refracts into another medium.

• It scatters in all directions.

• It is absorbed completely.

In a ray diagram, what is the relationship between the angle of incidence and the angle of reflection?

• They are unrelated.

• They are equal.

• The angle of incidence is always greater.

• The angle of reflection is always greater.

What is the angle of incidence if the angle of reflection is 34 degrees?

• 34 degrees

• 56 degrees

• 45 degrees

• 90 degrees

What occurs when light passes from a medium where it travels faster to one where it travels slower?

• It bends away from the normal.

• It bends towards the normal.

• It continues in a straight line.

• It is absorbed by the medium.

Why does a straw appear bent when placed in a glass of water?

• Because of absorption of light.

• Because the straw is actually bent.

• As a result of refraction of light.

• Due to reflection of light.