Study Guide 4: Sound, Light

Question 0

How do we hear frequencies of sound?

Answer 0

As having different pitch

Question 1

What types of wave is a sound wave?

Answer 1

Longitudinal (compression) wave

Mechanical wave

Question 2

Increase of 20dB=

Answer 2

Pressure wave is ten times greater in amplitude

Question 3

Loudness of sound affected by?

Answer 3

Frequency

Amplitude

Question 4

What is the Doppler effect?

Answer 4

Shift in frequency when sound source is moving at speeds less than the speed of sound
Frequencies shift higher- objects moving towards
Frequencies shift lower- objects moving apart

Question 5

Speed of sound in air

Answer 5

343 meters per second

Question 6

Subsonic

Answer 6

Object moving slower than sound

Question 7

Supersonic

Answer 7

Object moving faster than sound

Question 8

Nodes

Answer 8

Points of minimum amplitude

Question 9

Anitnodes

Answer 9

Points of maximum standing

Question 10

How resonance is created

Answer 10

Spaces enclosed by boundaries with sound waves

Question 11

When do beats occur

Answer 11

Two frequencies are close, not exactly the same

Question 12

Intensity of light

Answer 12

Amount of energy per second falling on a surface

Question 13

Intensity increases or decreases as it gets away from source?

Answer 13

Decreases

Question 14

Speed of light

Answer 14

3.00 x 10(to the power of 8)

Question 15

Light can come from two different processes

Answer 15

Emitted directly from object

We see the objects by reflected light

Question 16

Additive primary colors

Answer 16

Red
Green
Blue

Question 17

Subtractive primary colors

Answer 17

Cyan
Magenta
Yellow

Question 18

Photons

Answer 18

Particle of light as tiny bundles of energy

Question 19

Electromagnetic wave parts

Answer 19

Electric part

Magnetic part

Question 20

Optics

Answer 20

Study of light behaves

Question 21

Lens

Answer 21

Optical device used to bend light in a specific way (refraction)

Question 22

Converging lens

Answer 22

Light comes together

Question 23

Diverging lens

Answer 23

Light spreads

Question 24

Diffuse reflection

Answer 24

Single ray scatter into many directions

Question 25

Speculate reflection

Answer 25

Bounces odd in a single direction

Question 26

Prism

Answer 26

Optical device causes light to change directions (refraction)