Waves

Question 1

What is the function of a wave?

Answer 1

Waves transfer energy from one place to another, they don’t transfer any matter whatsoever

Question 2

Wave speed is equal to:

Answer 2

frequency (Hz) x Wavelength (m)

Question 3

Frequency equation

Answer 3

Frequency = 1/Time Period

Question 4

Transverse?

Answer 4

Perpendicular

Question 5

Longitudinal Waves

Answer 5

Parallel

Question 6

Some examples of transverse waves would be:

Answer 6

• Light
• Water Ripples
• Radiowaves

Question 7

Name some examples of Longitudinal Waves

Answer 7

• Sound Waves
• Seismic P-Waves

Question 8

When a wave is bounced off an object it __________ absorbed

Answer 8

When a wave is bounced off an object it isn’t always absorbed

Question 9

If a wave passes through an object and it’s transmitted, it ______________

Answer 9

If a wave passes through an object and it’s transmitted, it enters the object and passes through, causing the wave to refract.

Question 10

If a wave is reflected off an object it is ____________ off, no ______ is _______

Answer 10

Bounced off it, no energy is absorbed

Question 11

When drawing Ray Diagrams, the angle of _____________ = _______________

Answer 11

When drawing Ray Diagrams, the angle of Incidence = angle of reflection

Question 12

When drawing a ray diagram, we must have a ______________ and _______________

Answer 12

When drawing a ray diagram, we must have a perpendicular line (at 90’) and both sides must be equal

Question 13

There are two type of reflection: _______ and ________/________

Answer 13

Specular and Diffuses/Scattered

Question 14

Specular Reflection produces ___________ because the ___________

Answer 14

Specular Reflection produces a clear image because the surface is perfectly flat

Question 15

Diffuse/Scattered is __________ because ______________

Answer 15

Diffuse/Scattered is unreflective because the normal is different at each point meaning the light reflects in a different direction

Question 16

What type of spectrum do electromagnetic waves create?

Answer 16

A constant spectrum

Question 17

How do speeds of electromagnetic waves vary in an air and vacuum

Answer 17

The don’t, wave speed is the same

Question 18

What factors in waves cause refraction?

Answer 18

Velocity relates to the wave speed.
If the wave speed is slower, it causes refraction in denser materials

Question 19

In what direction do waves refract when entering a dense object?

Answer 19

They bend towards the normal line, the angle of refraction is less than the angle of incidence

Question 20

Which type of waves can be produced by oscillations in an electrical circuit?

Answer 20

Radiowaves

Question 21

Where do gamma rays come from?

Answer 21

The change in the nucleus of atoms

Question 22

What risks do UV Have?

Answer 22

Skin cancers and premature skin aging

Question 23

What health effects do X-rays and Gamma Rays have?

Answer 23

Highly ionising causing genetic mutation

Can cause cancer

Question 24

Give 3 Practical uses for IR

Answer 24

Electrical Heaters
Thermometers
Cooking food

Question 25

Give 2 uses of Microwave Radiation

Answer 25

Satellite Communications
Cooking Food

Question 26

Why doesn’t magnification have a unit?

Answer 26

Magnification corresponds to the ration between image and object size, ratio doesn’t need a unit

Question 27

What colour of light has the highest frequency?

Answer 27

Blue

Question 28

What light has the largest wavelength?

Answer 28

Red

Question 29

Transverse Waves: Parallel or Perpendicular

Answer 29

Transverse Waves have oscillations Perpendicular to energy transfer

Question 30

Transverse: Electromagnetic Spectrum: Yes or No?

Answer 30

Yes

Question 31

Longitudinal: Electromagnetic Spectrum: Yes or No?

Answer 31

No

Question 32

What is the speed of EM Waves

Answer 32

3x10^8