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Physics > What is Light? (lesson 2) > Flashcards

What is Light? (lesson 2) Flashcards

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1
Q

Light is an

A

“electromagnetic wave”

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2
Q

Properties of

A

of light

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3
Q

Electromagnetic waves

A

in society

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4
Q

WHAT IS LIGHT

A

IS MADE UP OF ENERGY WAVES
PRODUCED WHEN ELECTRONS ARE “EXCITED”

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5
Q

WHY is light impotant?

A

allows for visibility
heats and warms earth
provides energy required for photosythesis

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6
Q

Properties of light-
Speed of light-

A

3.00 × 10 to the power of 8 m/s
vac

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7
Q

Properties of light-
Travels through a

A

vacuum
-does not require a medium (can travel without particles)

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8
Q

Properties of light-
linear propagation

A

travels is a straihgt line

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9
Q

Properties of light-
Reflection/Refraction

A

-bouncing of light off a surface
-bending of light when enters a new medium

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10
Q

the energy of light waves

A

VARY

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11
Q

Electromagnetic waves
light is made up of

A

waves

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12
Q

The energy of waves

A

VARY

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13
Q

Wavelength-

A

length of 1 wave

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14
Q

shorter waveslength have
longer =

A

higher energy
lower

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15
Q

Frequency

A

of waves per second

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16
Q

shorter wavelength (f)

A

higher frequency
more frequency more energy

17
Q

visible light is within a

A

specific energy range

18
Q

List the electromagnetic spectrum in order from the lowest energy to the highest energy waves.

A

radio waves, microwaves, infrared waves, visible light, ultraviolet, x-ray, and gamma rays

red, orange, yellow. green, blue, violet.

19
Q

Light is made up of electromagnetic waves. What are the five (5) properties of light discussed
in class?

A

 Linear Propagation
 Speed of Light
 Travels in a Vacuum

lions speak to rhinos everyday

 Reflection/Refraction
 Energy of Waves Varies

20
Q

The energy of light may vary. List and describe the two (2) factors that affect the energy of
light?

A

Wavelength – the distance between two peaks in a wave (how long is the wave?)

 Wave Frequency – the number of times a wave repeats itself in one (1) second
(how often does the wave occur?)

Physics (12 decks)

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