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AP Science > Light > Flashcards

Flashcards in Light Deck (31):
1

Electromagnetic Spectrum

complete range of wavelengths of energy radiated as electric and magnetic fields

2

Radio Waves

complete range of wavelengths of energy radiated as electric and magnetic fields

3

Infra-red Radiation

invisible radiation emitted by all warm objects. You feel infra-red radiation as heat.

4

Visible Light

very small part of the electromagnetic spectrum to which our eyes are sensitive

5

Ultraviolet Radiation

invisible radiation similar to light but with a slightly higher frequency and more energy

6

X-Rays

high-energy electromagnetic waves that can be transmitted through solids and provide information about their structure

7

Gamma Rays

high-energy electromagnetic radiation produced during nuclear reactions. They have no mass and travel at the speed of light.

8

Electromagnetic Waves

electromagnetic energy that is transmitted as moving electric and magnetic fields. There are many different types of electromagnetic energy, e.g. light, microwaves, radio waves.

9

Rays

narrow beams of light

10

Beam

wide stream of light rays, all moving in the same direction

11

Reflection

bouncing off the surface of a substance

12

Luminous

releasing its own light

13

Scattering

describes light sent in many directions by small particles within a substance

14

Transparent

describes a substance that allows most light to pass through it. Objects can be seen clearly through transparent substances.

15

Translucent

allowing light to come through imperfectly, as in frosted glass

16

Concave

curved inwards

17

Convex

curved outwards

18

Lateral Inversion

reversed sideways

19

Refraction

change in the speed of light as it passes from one substance into another. It usually involves a change in direction.

20

Model

a three-dimensional representation of a person or thing or of a proposed structure, typically on a smaller scale than the original.

21

Photons

a particle such as a quantum of light or electromagnetism

22

Light

the natural agent that stimulates sight and makes things visible

23

Energy

the strength and vitality required for sustained physical or mental activity

24

Speed of light

Aproximatley 300 000 km per second

25

Shadow

a dark area or shape produced by a body coming between rays of light and a surface

26

Retina

a layer at the back of the eyeball that contains cells sensitive to light, which trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed.

27

Pupil

The pupil determines how much light is let into the eye

28

Iris

controls how much might need to be let in

29

Lens

allows us to focus light

30

Optic Nerve

carries the image to your brain

31

Cornea

a layer of skin that cover & protect your eye