intro

Question 1

light is a form of ___ that travels in straight lines thru space and into our atmosphere

Answer 1

energy

Question 2

light takes the form of a

Answer 2

wave

Question 3

light is a type of _____ radiation

Answer 3

electromagnetic

Question 4

electromagnetic radiations is made of wave patterns of both ___ and magnetic parts moving at right angles to each other

Answer 4

electric

Question 5

all types of radiation are composed of TINY PACKETS OF ENERGY:

Answer 5

photons (made when excited electrons return to the ground state)

Question 6

wavelength: (nanometers)

Answer 6

individual length of each wave from leak to peak or trough to trough

Question 7

number of waves that pass a point per second:

Answer 7

frequency

Question 8

wavelength and frequency are related to each other __\

Answer 8

inversely

Question 9

wavelength increases (longer), frequency ____

Answer 9

decreases (result: low energy)

Question 10

wavelength decreases (shorter), frequency:

Answer 10

increases (high energy radiation)

Question 11

electromagnetic spectrum extends from the longest radio waves to

Answer 11

the shortest gamma rays

Question 12

range of electromagnetic radiation:

Answer 12

electromagnetic spectrum

Question 13

only type of electromagnetic wave that humans can see

Answer 13

visible light

Question 14

light sources can be natural (sun) or

Answer 14

artificial (light bulb/candle)

Question 15

atoms within the material absorb energy, become excited, become

Answer 15

unstable, release energy in form of light

Question 16

luminous objects:

Answer 16

produce their own light (sun)

Question 17

non luminous objects:

Answer 17

don’t produce their own light (moon)

Question 18

types of light transmission:

Answer 18

transparent, translucent, opaque

Question 19

transparent materials: (clear glass)

Answer 19

transmit freely, reflect and absorb little

Question 20

translucent materials: (frosted glass)

Answer 20

don’t transmit or reflect a LOT

Question 21

opaque materials: (thick plastic)

Answer 21

reflect and absorb, don’t transmit

Question 22

can penetrate matter but not bone

Answer 22

x ray waves (used in doctors offices)

Question 23

visible waves colour spectrum

Answer 23

ROYGBIV

Question 24

ROYGBIV

Answer 24

Red, orange, yellow, green, blue, indigo, violet

Question 25

used to kill bacteria

Answer 25

ultraviolet

Question 26

can scan carry on luggage

Answer 26

x rays

Question 27

cook thaw and heat up food

Answer 27

micro waves

Question 28

control dvd player with remote

Answer 28

infrared waves

Question 29

used in cancer treatment

Answer 29

gamma rays

Question 30

enable phone calls and texts

Answer 30

radio waves

Question 31

rainbows

Answer 31

visible waves

Question 32

cause skin to tan and burn

Answer 32

iltraviolet

Question 33

increase vitamin d and risk of skin cancer

Answer 33

ultraviolet waves

Question 34

transmit songs over radio

Answer 34

radio waves

Question 35

shortest wavelength, highest frequency

Answer 35

gamma waves

Question 36

longest wavelength, lowest frequency

Answer 36

radio

Question 37

wave FREQUENCY ___ from left to right across electromagnetic spectrum

Answer 37

increases

Question 38

wave ENERGY ___ left to right across electromagnetic spectrum

Answer 38

increases