Light stuff

Question 1

wavelength

Answer 1

length between crests

Question 2

frequency

Answer 2

number of waves that pass by each second

Question 3

radiative energy

Answer 3

energy carried by light and radio waves

Question 4

gravitational potential energy

Answer 4

More potential energy when higher and more kinetic when lower

Question 5

color with the longest wavelength

Answer 5

Red

Question 6

color with the shortest wavelength

Answer 6

violet

Question 7

luminosity

Answer 7

amount of light leaving a source

Question 8

luminosity depends on

Answer 8

temp and size

Question 9

brightness

Answer 9

amount of light arriving

Question 10

absorption

Answer 10

electron absorbs energy of a photon to go to a higher level

Question 11

continuous spectrum

Answer 11

comes from dense hot objects

Question 12

flux

Answer 12

amount of energy emitted per square centimeter

Question 13

Blueshift

Answer 13

Light is moving towards the observer. emitted light will decrease

Question 14

Redshift

Answer 14

Light is moving away from the observer. Emitted light will increase

Question 15

Refracting telescope

Answer 15

Glass lenses focus light from distant objects, limited by the size of lense

Question 16

reflecting telescopes

Answer 16

uses curved mirrors to focus light, can be made much larger then refracting telescope

Question 17

why do stars twinkle

Answer 17

cause earths atmosphere degrades images

Question 18

weins law

Answer 18

blue is hotter then red