Sound And Light

Question 1

Plane Mirrior

Answer 1

A plan mirror is a mirror that reflects light perfectly(specular reflection).

Question 2

Refraction

Answer 2

Refraction is the bending of light waves as they slow down when they pass through a different medium.

Question 3

Pitch

Answer 3

Pitch is how high or low a sound is. The higher the frequency, the higher the pitch.

Question 4

Ultrasound

Answer 4

If a sound is considered ultrasound, it is inaudible to humans.

Question 5

Audible range

Answer 5

If a sound is at an audible range, it can be heard by humans.

Question 6

Wavelength

Answer 6

Wave is the distance from one part of a wave to the same part on another wave.

Question 7

Peake/crest/trough

Answer 7

The peak/crest is the top of a transverse wave, whereas the trough is the bottom of a transverse.

Question 8

Medium

Answer 8

A medium is a substance or material.

Question 9

Echo

Answer 9

Echo is when sound reflects of a surface.

Question 10

The speed of sound

Answer 10

The speed of sound in air is 340 metres per second. The speed of sound in water is 1,500 , metres per second and in iron it travels a at 5,120 metres per second. Sound travels faster in solids and liquids than it does in air. Sound travels in longitudinal waves.

Question 11

Amplitude

Answer 11

The distance from the middle of the wave, to the top or the bottom. The higher the amplitude, the louder the sound.

Question 12

Diffuse scattering

Answer 12

This is when light rays are shone onto a non-reflective surface and the light scatters when it hits the surface, rather than being reflected.

Question 13

Specular reflection

Answer 13

Specular reflection is when light is reflected perfectly off of a surface.

Question 14

The incident ray

Answer 14

This is the ray that is shone onto a surface.

Question 15

Reflected ray

Answer 15

This is the ray that is reflected off of a surface after the incident ray has shone onto it.

Question 16

The speed of light

Answer 16

The speed of light through air is 3 times 10 to the power of 8 metres per second. The speed of light through glass is 2 times 10 to the power of 8 metres per second. Light travels in transverse waves.

Question 17

Concave lens

Answer 17

Concave lenses are used for people who are short sighted. This means that the light does not reach the retina. The concave lenses diverge the light so that they reach the retina.

Question 18

Convex lens

Answer 18

Convexlenses are used for people who are long sighted. This means that the light goes past the retina. The convex lenses converge the light so that it doesn’t go past the retina

Question 19

Wave

Answer 19

A reoccurring vibration that transports energy, light or sound.

Question 20

The law of reflection

Answer 20

This is that the angle of incidence is equal to the angle of reflection.

Question 21

Transverse waves

Answer 21

In transverse waves, the vibrations are at right angles to the direction of travel. Light travels in transverse waves.

Question 22

Longitudinal waves

Answer 22

In longitudinal waves, the vibrations are along the same direction as the direction of travel. Sound travels in longitudinal waves.

Question 23

Angle of Refraction

Answer 23

The angle of refraction is the angle that the light ray is at when it is bent as it travels through a different medium.

Question 24

Vacuum

Answer 24

A vacuum is a place that has no particles or mediums.

Space is vacuum.

Question 25

Reverberation

Answer 25

Reverberation an echo, which is when sound is reflected off of a surface.

Question 26

Frequency

Answer 26

The frequency is the amount of waves that go in one second.