Waves

Question 1

Wavelengths of light

Answer 1

4, -2, -5, -7, -8, -10, -15

Question 2

What’s a real image?

Answer 2

Behind focus, can be projected.

Question 3

What can produce only virtual images?

Answer 3

Concave lenses

Question 4

Are P-waves longitudinal or transverse?

Answer 4

fast Longitudinal - pass through solid and liquid

Question 5

Are s-waves longitudinal or transverse?

Answer 5

Transverse only solids

Question 6

What is special about longitudinal waves?

Answer 6

They require a medium

Question 7

What is a transverse wave?

Answer 7

oscillate perpendicular to direction of energy transfer

Question 8

What is a longitudinal wave?

Answer 8

oscillate parallel to direction of energy transfer

Question 9

What are waves?

Answer 9

transfers of energy. The waves move, not the medium

Question 10

What is amplitude?

Answer 10

Maximum displacement from the equillibrium

Question 11

What things can happen when a wave passes through a material?

Answer 11

Passes through
Refraction
Absorbed
Reflected

Question 12

What is an incidence ray?

Answer 12

the OG ray

Question 13

What is the normal?

Answer 13

the line perpendicular to the reflective surface

Question 14

What’s the link between angle of reflection and angle of incidence?

Answer 14

they are the same

Question 15

Normal human hearing range?

Answer 15

20 - 20 000Hz

Question 16

Why can Humans only hear a certain range?

Answer 16

The frequency of the wave may not trigger vibrations

Question 17

Wave speed, wave length and wave frequency - which can change when passing though different mats?

Answer 17

speed and length

Question 18

what’s wrong with cathode ray oscilloscopes?

Answer 18

they show sound as transverse, but they are longitudinal

Question 19

how are amplitude and sound connected?

Answer 19

large = loud, smol = quiet

Question 20

What is ultrasound?

Answer 20

Sounds which is higher than 20 000Hz

Question 21

What’s an electromagnetic wave?

Answer 21

Transverse waves that transfer energy from source to absorber

Question 22

Low to high frequency colours

Answer 22

Red Orange Yellow Green Blue Indigo Violet

Question 23

EM spectrum from low to high

Answer 23

radio, microwaves, infrared, visible, ultraviolet, X-Rays, Gamma-Rays

Question 24

What can electromagnetic waves do that normal rays can’t?

Answer 24

travel without a medium i.e in a vaccum

Question 25

How fast do electromagnetic waves move through a vaccum?

Answer 25

300 000 000 m/s

Question 26

What happens when waves speed up?

Answer 26

they bend away from the normal

Question 27

What happens when electromagnetic waves are generated or absorbed?

Answer 27

changes happen in the nuclei i.e jumping electrons radioactive nucleus

Question 28

What's bad about ultraviolet?

Answer 28

increase skin cancer, cause skin age prematurely

Question 29

What's bad about X-rays and Gamma Rays?

Answer 29

makes genes mutate and cause cancer

Question 30

How to transmit radiowaves?

Answer 30

transmit oscillate electrons, receive oscillate electrons, make ac

Question 31

What's special about radiowaves?

Answer 31

they can go rlly long distances through Earth's ionosphere

Question 32

What can ultraviolet light be used for?

Answer 32

Efficient Light bulbs, tanning beds

Question 33

What is it called if the image is smaller?

Answer 33

diminished

Question 34

What is it called if the image is bigger?

Answer 34

magnified

Question 35

What is it called when the image is upside down?

Answer 35

inverted

Question 36

when does a convex lens create a virtual image?

Answer 36

in a magnifying glass

Question 37

What is specular reflection?

Answer 37

reflection on a smooth surface that generates an image

Question 38

What is diffuse reflection?

Answer 38

Reflection on a rough surface. Image not made

Question 39

what does temp of an object affect?

Answer 39

wavelength and intensity

Question 40

hot objects emit what length?

Answer 40

short