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physical science > Sound and light Chelsea > Flashcards

Sound and light Chelsea Flashcards

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Biology 101 flashcards
0
Q

What is infrasound?

A

Sounds that are to soft for the human ear to hear

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1
Q

What is a sound wave?

A

A longitudinal wave caused by vibrating objects and it has to travel through a medium.

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2
Q

What is ultrasound?

A

Noise frequency that is above human hearing

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3
Q

What is resonance?

A

When two objects vibrate at the same frequency

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4
Q

What is intensity?

A

The rate at which the sound waves travel through a medium

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5
Q

What is a decibel?

A

The unit that intensity is measured in

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6
Q

What is fundamental frequency?

A

The frequency of a standing waves vibration

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7
Q

What is harmonics?

A

The vibration of the fundamental frequency and a certain whole number and multiplied.

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8
Q

Sonar

A

System that uses signals and echo returns to determine the location of the object.

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9
Q

Basilar membrane

A

A long flexible membrane in the cochlea. Different parts of it vibrate at different frequencies.

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10
Q

Photon

A

A unit or quantum of light. Ex. Light beam is a stream of photons because they don’t have mass.

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11
Q

Radar

A

Use radio waves to determine the velocity and location of an object.

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12
Q

Electromagnetic Spectrum

A

Light at all possible energies, frequencies, and wave lengths.

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13
Q

What is a light ray?

A

An imaginary line that is running in the direction that light travels.

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14
Q

What is virtual image?

A

Image that forms at a location where the light rays appear but they are not actually there

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15
Q

What is a real image?

A

Image of the object that is formed by the light rays where they actually come together.

16
Q

What is diffuse reflection?

A

When the reflection of light is reflected in all different directions.

17
Q

What is geometrical optics?

A

When you are studying light in cases where it is a ray.

18
Q

What is a convex mirror?

A

Mirrors that bulge out and makes the light rays go in different directions.

19
Q

What is a concave mirror?

A

A mirror that is indented. It takes the light rays and moves reflects them towards one another.

20
Q

What is total internal reflection?

A

Reflection that takes place in a substance when the light rays that are reflected are the same as the real ones but the real light is less than the critical angle.

21
Q

What is a lens?

A

Transparent object that reflects lights to come together or move away to create an image.

22
Q

What is magnification?

A

The change is the same of the object compared to its actual size.

23
Q

What is a prism?

A

A system that has two or more transparent smooth surfaces that are at an angle from each other.

24
Q

What is dispersion?

A

When light is separated because of the different wave lengths into different colors.

25
Q

What is mirage?

A

An allusion caused by earths conditions

26
Q

What is converging lens?

A

Bends light toward each other.

27
Q

What is focal point?

A

Where the light rays meet at one point after they are reflected or refracted.

28
Q

What is normal?

A

A perpendicular line to the surface where light hits then is reflected or refracted

29
Q

What is the law of reflection?

A

The law which the angle of reflection and angle of incidence work together

30
Q

What is the angle of reflection?

A

The angle of light rays reflecting off the surface.

31
Q

What is the angle of incidence?

A

The angle of light rays striking the surface

32
Q

What is pitch?

A

How high or low a sound is.

33
Q

What is intensity?

A

Depends of the amount of light. The number of photons that move through a space

physical science (9 decks)

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