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Science 9 > Chapter 12 – Light And Color > Flashcards

Chapter 12 – Light And Color Flashcards

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1
Q

Electromagnetic waves that the human eye can perceive

A

Visible light

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2
Q

Mixture of all the colors of light

A

White

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3
Q

Weaker white light

A

Gray

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4
Q

The absence of all color

A

Black

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5
Q

Light rays from distant object reflected by heated air so that appears closer

A

Mirage

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6
Q

Produced by refracted starlight as it travels between air of different densities

A

Scintillation

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7
Q

Lighter edges around a shadow

A

Penumbra

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8
Q

The dark part of a shadow

A

Umbra

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9
Q

Beam of light with all its waves aligned in the same direction

A

Polarized

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10
Q

Arrangement of all forms of electromagnetic radiation in order of frequency and wavelength

A

Electromagnetic spectrum

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11
Q

System using microwaves or radio waves to measure distance and direction of faraway objects

A

Radar

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12
Q

Process of photon emission by stimulation of already-excited atoms

A

Stimulated emission

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13
Q

Devise which generates and amplifies high-energy beams of light

A

Laser

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14
Q

Beam of light with only one frequency

A

Monochromatic

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15
Q

3-D image produced by laser light

A

Hologram

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16
Q

Horizontal distortion of an object traveling at very high speed

A

Lorentz contraction

17
Q

What book did Sir Isaac Newton discuss the colors and properties of light in?

A

Optiks

18
Q

Scottish physicist who demonstrated that light consisted of electromagnetic waves

A

(James Clerk) Maxwell

19
Q

Phenomenon that light above a certain frequency can knock electrons loose
from atoms of certain metals

A

Photoelectric effect

20
Q

Electromagnetic waves traveling as photons

A

Light

21
Q

Particles that make up light

A

Photons

22
Q

Six Basic colors of the visible spectrum

A 
Red🦀
Orange🍂
Yellow🐝
Green🍀
Blue💦
Violet⚛
23
Q

The additive primary colors

A

Red❤️
Green💚
Blue💙

24
Q

Seven broad categories of the electromagnetic spectrum in order of increasing frequency

A 
Radio waves 
Microwaves 
Infrared waves 
Visible light 
Ultraviolet radiation 
X-Ray 
Gamma ray
25
Q

Single frequency, coherent, intense light

A

Laser light(not spreading🔦!)

26
Q

Technique of transmitting light through optical fibers

A

Fiber optics

27
Q

Apparent slowing of time for a rapidly moving object

A

Time dilation

28
Q

What theory says that gravity is the results of the geometry in space?

A

General theory of relativity

29
Q

Describe the properties of an electromagnetic wave.

(Describe orientation and where it can travel)😊

A

Two transverse waves, one and electrical field and one a magnetic field, oscillating at right angles to each other
//
And of course light can travel through empty space

30
Q

How does a prism separate the different wavelengths of light?

A

By refracting the light that passes through it

31
Q

Briefly describe the difference between a virtual image and real image

A

Virtual image – appears to be behind the mirror; no light actually passes through the image
Real image – forms in front of the mirror; light passes through the image

32
Q

Tell the difference between a node and an antinode

A

Dark fringe formed as light from different parts of the slit interferes destructively(for a node)
Light fringe formed as light from different parts of it interferes constructively(for the antinode)

33
Q

On what does the energy of a photon depend?

A

It’s frequency!😛

34
Q

What theory uses the constant speed of light to explain high-speed motion?

A

Special theory of relativity

35
Q

What is a concave lens?

A

Concave lens causes light to diverge; is curved inward; and causes objects to appear more distant

36
Q

What is a convex lens?

A

Convex lens curve outward; causes light to converge; and magnifies objects

37
Q

Which is longer – a second on Jupiter or a second on our earth? And why?

A

A second on Jupiter would be longer than a second on earth. The reason why is because Jupiter has stronger gravity than earth.

Science 9 (7 decks)

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