Waves

Question 1

How do waves transfer energy?

Answer 1

From one point to another
Through vibrations

Question 2

Examples of transverse waves

Answer 2

Sound
Ultrasound

Question 3

Examples of longitudinal waves

Answer 3

Water waves
Electromagnetic waves

Question 4

How to calculate wave speed?

Answer 4

V = F x λ

Question 5

What is an ultrasound and where is it used?

Answer 5

Frequency about 20,000 Hz
Used in medicine to measure foetal head diameter
Used in industry to detect defects in metals

Question 6

What does sonar use and why?

Answer 6

Uses sound pulses to detect objects underwater

Question 7

What are electromagnetic waves use for?

Answer 7

Used in radars to detect aircraft and ships

Question 8

Dangers of using microwaves

Answer 8

Internal heating of body tissue

Question 9

Dangers of using infrared

Answer 9

Causes skin burns

Question 10

Dangers of visible lights

Answer 10

Damages eyes

Question 11

Dangers of X-ray and gamma waves

Answer 11

Damage to cell leading to camcer

Question 12

What do all Electromagnetic waves have in common?

Answer 12

All travel at the same speed in a vacuum

Question 13

What is the EM spectrum in order of decreasing wavelength

Answer 13

Radio
Micro
Infrared
Visible
Ultra-violet
X-ray
Gamma