P6: Waves

Question 1

Waves (definition):

Answer 1

Something that transfers energy from one place to another without transferring matter

Question 2

Transverse waves:

Answer 2

• It causes the particles in the medium to vibrate at right angles to the direction of the waves motion

Question 3

Longitudinal waves:

Answer 3

A longitudinal wave causes the medium particles to vibrate in the in the same direction as the wave’s motion

Question 4

Amplitude (definition)

[2]:

Answer 4

• The largest distance that a point on a wave moves from its rest position
• measured in metres

Question 5

Wavelength (definition)

[2]:

Answer 5

• The distance between two adjacent wavefronts

- Measured in metres

Question 6

Oscillation (definition):

Answer 6

——————————————————————————————————————————————————————————————————————————————-

Question 7

Describe the image produced by the plane mirror:

Answer 7

Laterally inverted and a virtual image

Question 8

What is a virtual image?

Answer 8

An image that cannot be projected onto a screen

Question 9

What is the speed of light in a vacuum?

Answer 9

Light has a constant speed of 200,000 km/s in a vacuum

Question 10

Refractive index (equation):

Answer 10

Speed in a vacuum
———————————————-
Speed of light through material

Question 11

Wave speed(equation):

Answer 11

Wave speed= wavelength x frequency

Question 12

What can gamma rays be used for?

Answer 12

• To kill harmful bacteria in food and on surgical instruments
• This is because they