Reflection, Refraction and Total Internal Reflection

What do we call a material that light can travel through?

• air

• water

• medium

• pathway

Tags

NGSS.MS-PS4-2

The speed of light in a vacuum is _______  $m.s^{-1}$  

• 3x10⁸

• 3x10¹²

• 3x10⁶

• 3x10¹⁰

What happens when light hits a shiny or smooth surface?

• It disappears.

• It is refracted.

• It is absorbed.

• It is reflected.

Tags

NGSS.MS-PS4-2

According to the Law of reflection, a light ray striking a mirror

• continues moving through the mirror in the same direction
• moves into the mirror at a slightly different angle
• bounces off the mirror toward the direction it came from
• bounces off the mirror at the same angle it hits.

Tags

NGSS.MS-PS4-2

Which letter refers to the angle of incidence?

• A

• B

• C

• D

Which letter refers to the normal line?

• A

• B

• F

• E

Which letter refers to the more optically dense medium?

• A

• B

• C

• D

Which letter refers to the angle of refraction?

• A

• B

• C

• D

What happens to the speed of light in a more optically dense medium?

• it slows down

• it speeds up

• stays the same because all light travels at the speed of light

Tags

NGSS.HS-PS4-1

Why does light refract when it enters a medium?

• light changes color

• light changes frequency

• light changes speed

• light changes density