Light And Sound

Question 1

Pitch

Answer 1

How high or low a sound is

Question 2

Hertz

Answer 2

How pitch is measured 1 wave/1 second

Question 3

Infrasound

Answer 3

Sound below 20 Hertz

Question 4

Ultrasound

Answer 4

Sound above 20,000 Hertz

Question 5

Intensity

Answer 5

The amount of energy in sound, the higher the intensity, the higher the amplitude

Question 6

Decibel

Answer 6

The unit used to measure volume

Question 7

Doppler Effect

Answer 7

The perceived change in pitch as a object creating a sound is moved past a listener

Question 8

Sound quality

Answer 8

The quality of every object producing its own sound

Question 8

Transmission

Answer 8

The movement of waves through matter

Question 9

Reflection

Answer 9

The bouncing back of a wave after hitter an object

Question 10

Absortion

Answer 10

The disappearing of a wave into an object

Question 11

Transparent

Answer 11

Almost all light passes through

Question 12

Translucent

Answer 12

Some light passes through

Question 13

Opaque

Answer 13

Not light passes through

Question 14

Scattering

Answer 14

The spreading out of a wave because particles are either reflecting or absorbing the light

Question 15

Primary Colors

Answer 15

The colors that combine to make any other colors

Question 16

Secondary Colors

Answer 16

The colors produced when two primary colors are combined equally

Question 17

Complementary Colors

Answer 17

Any two colors that combine to produce white light or black pigment

Question 18

Concave Mirror

Answer 18

A mirror that reflects light inwards making the object appear upside down

Question 19

Convex Mirrors

Answer 19

A mirror that reflects light outwards and has no focal point

Question 20

Concave Lens

Answer 20

Lens is reflected outward twice. This causes the image to be both smaller and upright.

Question 21

Convex Lens

Answer 21

Light is refracted inward twice once when entering the lens and again when exiting the lens. This makes the image appear right side up and upside down.

Question 22

Focal Point

Answer 22

Where all reflected light rays cross each other

Question 23

Cones

Answer 23

Cells that respond to color, specifically the prime colors of light, red, green and blue.

Question 24

Rods

Answer 24

Cells that resound to movement and contrast

Question 25

Regular Reflection

Answer 25

Reflection off a flat surface. Parallel light rays remain parallel.

Question 26

Diffuse Reflection

Answer 26

Reflection off an irregular surface. Parallel light rays reflect in different directions.

Question 27

Factors that affect the speed of sound

Answer 27

1. Temperature: The higher the temperature the faster the speed of sound 2. Stiffness: The stiffer the material the faster the speed of sound 3. Density: Typically the denser the material the faster the sound. But stiffness plays a role. 2 materials of equal stiffness but different densities will transfer differently. The denser will be slower.

Question 28

What is the relationship between pitch and frequency?

Answer 28

Frequency determines pitch. The higher the frequency the higher the pitch.

Question 29

What is the range of human hearing? What is the range of infrasound and ultrasound?

Answer 29

Human hearing: 20 Hz to 20,000 Hz Infrasound: Sounds below 20 Hz Ultrasound: Sounds above 20,000 Hz

Question 30

Why do sounds fade?

Answer 30

When waves spread out so their is less energy

Question 31

Define the Doppler effect and explain it

Answer 31

The perceived change in pitch when an object making a sound moves past the listener. When it pulls past the waves begin to get farther and farther apart causing the waves to spread out, so the pitch would drop.

Question 32

Why do instruments sound different?

Answer 32

Sound quality

Question 33

Fundamental Tones

Answer 33

The actual note/tone being played

Question 34

Overtones

Answer 34

High frequency waves produced by the object

Question 35

What is the electromagnetic spectrum from low frequency to high?

Answer 35

``` Radiowaves Microwaves Infared Ultraviolet Visible X-rays Gamma rays ```

Question 36

Primary and secondary colors of pigment?

Answer 36

Primary: Yellow, Magenta, Cyan Secondary: Green, Red, Blue

Question 37

Primary and secondary colors of light?

Answer 37

Primary: Red, Green, Blue Secondary: Yellow, Magenta, Cyan

Question 38

What type of lens is in our eye and how does it work?

Answer 38

Convex

Question 39

How are images formed through convex lens?

Answer 39

Light is refracted inward twice once when entering the lens and again when exiting the lens. This makes the image appear right side up and upside down.

Question 40

How are images formed through concave lens?

Answer 40

Light is reflected outward twice. This causes the image to be both smaller and upright.