Extra

Question 1

What is room temperature

Answer 1

23 degrees?

Question 2

What is the speed of light in water

Answer 2

2.3x10*8

Question 3

What is the refractive index from air to water

Answer 3

3x108
————-
2.3x108

Question 4

What happens when the angle of refraction reaches 90°

Answer 4

We get the critical angle (0°)

Question 5

What happens when we reach the critical angle

Answer 5

The light will reflect back into the glass

Question 6

Unit and symbol for wave length

Answer 6

M/s V

Question 7

Unit and symbol for wave length

Answer 7

Meters upside down y

Question 8

Unit and symbol for amplitude

Answer 8

A, meter

Question 9

Unit and symbol for frequency

Answer 9

Hertz, Hz?

Question 10

Name and symbol for measuring sound levels

Answer 10

Decibels dB

Question 11

1500 hz

Answer 11

1500 waves in 1 sec

Question 12

Explain how a ship works out the distance of the fish below

Answer 12

The ship has a transmitter that sends pulses of ultra sound which is reflected by the fish and picked up again by the ship’s receiver.

Question 13

What is the “formula” the ship uses

Answer 13

Time from pulse to detection divided by 2 and x the speed of sound in water (2.3)

Question 14

Speed of light in water

Answer 14

2.3x10*8

Question 15

Speed of sound in water

Answer 15

1500m/s