The video tutorial explains how the shape of a pencil appears to change when submerged in water due to the refraction of light. Refraction is the bending of light as it passes from one medium to another, such as from air to water. This bending causes objects to appear bent or larger underwater.

What is the term used to describe the bending of light as it passes through different mediums?

• Dispersion

• Reflection

• Diffraction

• Refraction

When light passes from air into water, what happens to its speed?

• It slows down

• It remains constant

• It stops completely

• It speeds up

What causes the pencil to appear bent when submerged in water?

• Scattering of light

• Refraction of light

• Reflection of light

• Absorption of light

How does refraction affect the appearance of objects underwater?

• They disappear

• They appear the same size

• They appear larger

• They appear smaller

Which of the following is NOT a result of refraction?

• Objects appear bent

• Objects appear larger underwater

• Light is absorbed completely

• Light changes speed