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Science 1st Semester > Chapter 9 > Flashcards

Chapter 9 Flashcards

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0
Q

A subatomic particle that makes up electromagnetic waves.

A

Votons

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1
Q

An ___________ is made up of vibrating __________ and _________ fields that move at the speed of light.

A

Electromagnetic waves; magnetic; electrical

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2
Q

Explosions of distant stars produce _____________ and produces images of the body

A

Gamma Rays

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3
Q

Round in the middle and meets together at the top and the bottom. Rays meet at the focal point.

A

Convex mirror

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4
Q

Thick at the top and bottom and thin in the middle. Rays spread out.

A

Concave mirror

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5
Q

What are the three factors that affects the speed of a wave?

A

Compressibility, temperature, and the density.

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6
Q

A reflection that is uneven.

A

Diffuse reflection

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7
Q

An even reflection

A

Regular reflection

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8
Q

What makes a rainbow?

A

The light is going at a fast rate, hitting the rain drops, making the light bend and go slower and when it exits the rain drop, the light spreads out into the colors of the rainbow.

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9
Q

What causes a mirage?

A

A hot pavement and cooler air above it which causes light refraction because light travels faster in hot air

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10
Q

A disturbance that involves the transfer of electric and magnetic energy.

A

A electromagnetic wave

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11
Q

The energy that electromagnetic waves transfer through matter or space

A

Electromagnetic radiation

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12
Q

The sun’s energy arrives on Earth as

A

Electromagnetic radiation

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13
Q

The distance between the crest of one wave and the crest of the next wave

A

Wavelength

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14
Q

The number of waves that pass a given point in a certain amount of time

A

Frequency

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15
Q

All electromagnetic waves travel at the same speed In a __________but have different ___________ and different _____________.

A

Vacuum; wavelengths; frequencies

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16
Q

A complete range of electromagnetic waves placed in order of increasing frequency is called the

A

Electromagnetic spectrum

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17
Q

What is the electromagnetic spectrum made of in order?

A

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

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18
Q

Electromagnetic waves with the longest wavelengths and the lowest frequencies

A

Radio waves

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19
Q

Have shorter wavelengths and higher frequencies than radio waves do.

A

Microwaves

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20
Q

An electromagnetic wave with wavelengths shorter than those of microwaves.

A

Infrared waves

21
Q

Electromagnetic waves that you can see

A

Visible light

22
Q

Electromagnetic waves with wavelengths just shorter than those of visible light.

A

Ultraviolet rays

23
Q

Electromagnetic waves with wavelengths just shorter than those of ultraviolet rays.

A

X-rays

24
Q

Electromagnetic waves with the shortest wavelengths and highest frequencies

A

Gamma rays

25
Q

Two ways in which a surface can reflect light

A

Regular reflection and diffuse reflection

26
Q

Occurs when parallel rays of light hit a smooth surface

A

Regular reflection

27
Q

A copy of the object formed by reflected or refracted rays of light.

A

Image

28
Q

Occurs in parallel rays of light hit an uneven surface

A

Diffuse reflection

29
Q

A flat sheet of glass that has a smooth, silver colored coating on one side

A

Plane mirror

30
Q

An image that forms where light seems to come from

A

Virtual image

31
Q

A ___________ produces a virtual image that is upright and the same size of the object

A

Plane mirror

32
Q

A mirror with a surface that curves inward like the inside of a bowl

A

Concave mirror

33
Q

An imaginary line that divides A mirror in half, much like the equator that divides Earth into Northern and Southern halves.

A

Optical axis

34
Q

The point at which rays parallel to the optical axis reflect and meet.

A

Focal point

35
Q

___________ can produce real or virtual images.

A

Concave mirrors

36
Q

Forms when light rays actually meet

A

Real image

37
Q

A mirror with a surface that curves outward.

A

Convex mirror

38
Q

A ___________ produces a virtual image that is always smaller than the object

A

Convex mirror

39
Q

When light hits an object, it can be ___________, ___________, and/or ___________.

A

Reflected; refracted; absorbed

40
Q

The ___________ of a medium is a measure of how much a light ray bends when it enters that medium.

A

Index of refraction

41
Q

A curved piece of glass or other transparent materials that refracts light.

A

Lens

42
Q

The type of image formed by a lens depends on the

A

Shape of the lens and the position of the object

43
Q

Carries signals for radio programs

A

Radio waves

44
Q

Power microwaves, cellphones, and radar

A

Microwaves

45
Q

Heat lamps gives off, most objects give this off.

A

Infrared waves

46
Q

An image that shows regions of different temperatures in different colors

A

Thermogram

47
Q

___________ That appears white is actually a mixture of different colors. A rainbow is made up of this.

A

Visible light

48
Q

Can damage or kill living cells, small doses are useful because they cause skin cells to produce vitamin D, which is needed for healthy bones and teeth.

A

Ultraviolet waves

49
Q

Uses are x-rays and can be used in industry and engineering.

A

X-rays

50
Q

Are used to examine the body’s internal structures, radioactive substances and contain nuclear reactions

A

Gamma rays

Science 1st Semester (4 decks)

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