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Physical Science > Sound and Light Landon Hodge > Flashcards

Sound and Light Landon Hodge Flashcards

0
Q

What is pitch?

A

It is how high or low a sound wave sounds, and it depends on frequency.

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1
Q

What is a sound wave?

A

It is a longitudinal wave that requires a medium to travel through and is caused by vibrations.

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2
Q

What is infrasound ?

A

It is a sound wave with a frequency lower than 20 Hz.

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3
Q

What is ultrasound?

A

It is a sound wave with a frequency of higher than 20 000 Hz.

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4
Q

What is resonance?

A

It is when two different objects vibrate naturally at the same frequency.

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5
Q

What is intensity?

A

It is how fast a sound wave transmits energy through a certain area of a medium. (How loud something is)

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6
Q

What is a decibel?

A

It is the unit that relative intensity is measured in.

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7
Q

What is fundamental frequency?

A

The frequency of a primary standing wave. Lowest frequency.

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8
Q

What are harmonics?

A

They are the certain number of whole-number multiples of the fundamental frequency.

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9
Q

What is sonar?

A

It is a system that sends out sound signals and receives the echo returns that come back in order to find an object’s location or to communicate.

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10
Q

What is the Basilar Membrane?

A

It is a membrane that is contained in the cochlea that is long and flexible. Parts of the Basilar Membrane vibrate at natural frequencies that are not the same.

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11
Q

What are photons?

A

They are a packet that contains energy or electrons and have no mass.

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12
Q

What is intensity in light?

A

It is how fast energy flows through a certain part of space. The quantity that measures how much light is lighting up a surface. It depends on the amount of light and power or how many photons.

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13
Q

What is radar?

A

It stands for radio detection and ranging. It is a system that bounces radio waves off of things to the speed and location of certain objects.

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14
Q

What is the electromagnetic spectrum?

A

It shows light at every possible frequency, wavelength, and energy.

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15
Q

What is a light ray?

A

It is an imaginary line that moves in the same direction that the light moves.

16
Q

What is a virtual image?

A

An image that appears somewhere where it looks like light is coming from but it actually isn’t.

17
Q

What is a real image?

A

An image of something where light rays actually do come together at a certain spot.

18
Q

What is a lens?

A

A transparent object that refracts light so that it comes together or moves apart to create a picture.

19
Q

What is magnification?

A

A change in the size of a picture to how the actual object.

20
Q

What is a prism in optics?

A

A system that has at least two plane surfaces of a see through solid at an angle with each other.

21
Q

What is dispersion in optics?

A

The act of separating a wave with different frequencies into individual waves. (White light into all of the colors)

22
Q

What is a mirage?

A

A virtual picture caused by refraction.

23
Q

What is diffuse reflection?

A

When light hits a rough surface and it is reflected at all different angles.

24
Q

What is geometrical optics?

A

When light acts like a ray.

25
Q

What is the angle of reflection?

A

The angle that light reflects off a surface at.

26
Q

What is the angle of incidence?

A

The angle when a light Ray hits a surface.

27
Q

What is the law of reflection?

A

The angle of incidence is the same as the angle of reflection.

28
Q

What is the normal?

A

The perpendicular line that goes through the mirror where the light Ray hits it.

29
Q

What is a convex mirror?

A

They are mirrors that bulge out and stretch the image that appears.

30
Q

What is a concave mirror?

A

A mirror that is indented and reflects light rays towards each other.

31
Q

What is total internal reflection?

A

The full reflection that takes place within an object and has an angle of incidence less than the critical angle.

32
Q

What is a converging lens?

A

It is a lens with a rounded side that refracts light rays toward each other.

33
Q

What is a focal point?

A

Light rays focused into a small area.

Physical Science (9 decks)

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