Physics: Unit 7 - Light and Optics

Unlike mechanical waves, electromagnetic waves can travel through:

• a vacuum

• water

• the ground

• air

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

An object appears red because it:

• reflects light waves of all colors

• reflects red light waves

• absorbs red light waves

• transmits light waves of all colors

Tags

NGSS.MS-PS4-2

Which electromagnetic wave carries the most energy?

• gamma waves
• microwaves
• radio waves
• light waves

Tags

NGSS.HS-PS4-4

The speed of light in a vacuum is:

• represented by the symbol "c"

• 3.00 × 10⁸ m/s

• constant

• all answers are correct

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Why is light refracted?

• Light speeds up
• Light slows down
• Light speed stays the same
• Light can either slow down or speed up

Tags

NGSS.HS-PS4-1

When all three primary light colors are mixed, which color is produced?

• black

• magenta

• white

• cyan

Light is considered to be

• electromagnetic waves
• particles
• transverse waves
• all of the above

Tags

NGSS.HS-PS4-3

What are the three primary colors of light?

• Red, Yellow, Blue

• Red, Green, Yellow

• Red, Green, Blue

• Yellow, Blue, Green

What does it mean to polarize light?

• Blocks light

• Causes light to travel in only one plane

• Reduces the amount of light

• Looks cool

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-5

Which of the following statements is true about a green grape?

• It absorbs green light.

• It absorbs white light.

• It reflects green light.

• It reflects white light.