Waves

Question 1

Wavelength

Answer 1

The distance between identical points (upside down y)

Question 2

Frequency

Answer 2

Number of waves that pass a fixed point in unit of time

Question 3

Amplitude

Answer 3

The maximum extent of a vibration

Question 4

Longitudinal wave

Answer 4

A wave that moves in the same direction as the direction in which the particles are vibrating
Eg. Ultrasound,sound waves

Question 5

Transversal waves

Answer 5

A we in which the vibrating element moves in a direction perpendicular (crossing) to the direction of advance of the waves eg. Light waves ,electromagnetic waves

Question 6

Wave speed

Answer 6

Frequency x wavelength
V= f x y

Question 7

Wave speed

Answer 7

Distance / time
V= x / t

Question 8

How to measure the velocity of sound in air and ripples on water surface

Answer 8

Have a tank of water, and get a wooden stick that touches.
By adding a lamp and motor, it adds waves that can be seen.

Count the number of waves that pass a point in 10 seconds and then divide by 10 to record frequency .

Calculate speed of waves by frequency x wavelength

Question 9

Refraction

Answer 9

The bending of light as it passes from one transparent substance into another

Question 10

Absorbtion / absorb

Answer 10

A substance captured and transform energy
Substances that absorb: Cotten,

Question 11

Transmit

Question 12

what the most dangerous electromagnetic wave

Answer 12

Gamma rays

Question 13

what the least dangerous electromagnetic wave

Answer 13

Radio waves