Light Refraction and Motion Dynamics

The video explains the concept of refraction, where light changes direction due to speed changes when passing through different media. An analogy using a shopping cart illustrates how light behaves similarly when moving from one medium to another. The video discusses how light bends towards the normal when moving from a rarer to a denser medium and away from the normal when moving from a denser to a rarer medium. It also highlights that light's direction does not change when it enters a medium perpendicularly. The video concludes with a preview of examples of refraction to be covered in the next video.

What is refraction of light?

• Scattering of light in different directions

• Absorption of light by a medium

• Transmission of light through an object with a change in direction

• Reflection of light off a surface

What happens to the speed of light when it travels from an optically rarer medium to an optically denser medium?

• It increases

• It fluctuates

• It remains the same

• It decreases

When light travels from a denser medium to a rarer medium, in which direction does it bend?

• Towards the normal

• Away from the normal

• It does not bend

• It bends randomly

In the shopping cart analogy, what happens to the cart's speed when it moves from the road to the grass?

• It remains the same

• It fluctuates

• It increases

• It decreases

Why does the cart change direction when it enters the grass at an angle?

• Because the road is slippery

• Because one wheel slows down first

• Because the cart is pushed harder

• Because the grass is smoother

What happens to the direction of light when it enters an optically denser medium at an angle?

• It does not change direction

• It bends towards the normal

• It bends randomly

• It bends away from the normal

When light moves from a denser to a rarer medium, what happens to its speed?

• It decreases

• It remains the same

• It increases

• It fluctuates

In the cart analogy, what happens to the cart's direction when it moves from grass to concrete at an angle?

• It turns towards the normal

• It moves in a circular path

• It turns away from the normal

• It does not change direction

What happens to the direction of light when it enters an optically rarer medium perpendicularly?

• It bends randomly

• It bends towards the normal

• It bends away from the normal

• It does not change direction

If light enters an optically denser medium perpendicularly, what happens to its speed?

• It decreases

• It remains the same

• It increases

• It fluctuates