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Science > Waves > Flashcards

Waves Flashcards

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1
Q

Crest

A

The top of the wave

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2
Q

Trough

A

The bottom of the wave

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3
Q

Rest position

A

The line in the middle

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4
Q

Amplitude

A

The distance from the rest position to the top of the crest or to the bottom of a trough

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5
Q

Wavelength

A

The distance between two crests or two troughs

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6
Q

Frequency

A

How many waves pass a set point in one second

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7
Q

Absorption

A

The process of energy entering material but not exiting the material

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8
Q

Reflection

A

When light bounces off of a material/object

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9
Q

Transmission

A

The act of energy passing through a medium ir vacuum

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10
Q

Refraction

A

When a wave changes direction due to a change in speed of the wave, usually in response to the wave traveling from one medium to another

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11
Q

What is white light?

A

A mixture of all the colors of the rainbow

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12
Q

What happens when all the colors are absorbed?

A

It changes into heat

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13
Q

Why do we see white objects?

A

Because the colors are reflecting

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14
Q

Why do we see black objects?

A

Because all the colors are being absorbed

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15
Q

What are the primary colors?

A

Red, yellow, and blue

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16
Q

Why is the sky blue?

A

Because sunlight light is scattered by the air

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17
Q

What can a prism do?

A

It can break up light into all the colors of the rainbow

18
Q

What is it called when light strikes and object and passes though it without scattering?

A

Transparent

19
Q

What is it called when an object transmits light but the image aren’t clear?

A

Translucent

20
Q

What are some materials that are transparent?

A

Clear glass, pure water, and air

21
Q

What are some materials that are translucent?

A

Very dirty glass and tissue paper

22
Q

Ocean waves

A

A type of mechanical wave were energy moves through a medium,

23
Q

Longitude wave

A

Energy compresses and expands the space between particles

24
Q

Sound waves

A

The particles of the medium carrying the sound move back and forth parallel to the direction the energy travels.

25
Q

What is a method of measuring frequency?

A

By counting the number of peaks or compressions that pass a certain point over given time.

26
Q

Where are transverse wave found?

A

The wavelength is commonly found by measuring the distance between two successive crests of a wave.

27
Q

What is interaction interference?

A

When two or more waves that travel in the same medium can interact with each other.

28
Q

What happens when interaction interference happens?

A

When it occurs, the displacement of a point is equal to the sum of the displacements of the different waves at that point.

29
Q

What type of wave is light?

A

Electromagnetic wave, and electromagnetic waves don’t need matter to travel.

30
Q

What is a concave mirror?

A

It is shaped like the round end of a spoon or the inside of bowl, reflected light converges to a point in front of the mirror.

31
Q

What is another name for concave mirrors and why?

A

Converging mirrors because they tend to reflect the light that falls on them toward a focal point.

32
Q

What is a convex mirror?

A

It is shaped like the Bottom of a spoon or bowl. Reflected light diverges away from the mirror.

33
Q

What is another name for convex mirrors and why?

A

Bankers’ eyes because they would be used to keep employees from stealing.

34
Q

Why does light travel in straight lines?

A

Because the shining of a powerful light source through a thin slit produces a straight narrow beam.

35
Q

What is a lens?

A

A curved pice of a transparent material, like glass and plastic.

36
Q

What can a lens do?

A

A lens refracts light rays, or bends them, in a way that forms an image.

37
Q

What is refraction responsible for?

A

It is responsible for the colors of soap bubbles and when we see the spectrum of colors in a rainbow, and for some optical illusions.

38
Q

Why are rainbows created?

A

They are created because raindrops refract each different wavelength in white light from the sun at a different angle, between 40 and 50 degrees, depending on the color.

39
Q

How does an object get hot when it absorbs all the light?

A

It happens when light waves interact with electrons in the atoms of a material.

40
Q

Are all waves mechanical?

A

No, for example, outer space doesn’t.t have much matter in it, but light waves still travel from the sun to Earth.

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