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Flashcards in Light Deck (25):
1

Light

The natural agent that stimulates sight and makes things visible.

2

Beam

A ray or shaft of light.

3

Ray

Each of the lines in which light (and heat) may seem to stream from the sun or any luminous body, or pass through a small opening.

4

Energy

The strength and vitality required for sustained physical or mental activity.

5

Luminous

Giving off light; bright or shining.

6

Non-luminous

Not capable of producing light, but can be capable of reflecting light from another source.

7

Speed of light

The distance light can travel in a unit of time through a given substance.

8

Shadow

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

9

Electromagnetic wave

One of the waves that are propagated by simultaneous periodic variations of electric and magnetic field intensity and that include radio waves, infrared, visible light, ultraviolet, X-rays, and gamma rays.

10

Frequency

The rate at which something occurs over a particular period of time or in a given sample.

11

Wavelength

The distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.

12

Colours

The property possessed by an object of producing different sensations on the eye as a result of the way it reflects or emits light.

13

Velocity

The speed of something in a given direction.

14

Colour spectrum

The distribution of colors produced when light is dispersed by a prism.

15

Reflection

The throwing back by a body or surface of light, heat, or sound without absorbing it.

16

Absorption

The process by which one thing absorbs or is absorbed by another.

17

Eyelids

Shut our light.

18

Eyelashes

Catch and trap dust.

19

Tears

Small glands inside your eyes to tears keeping your eyeballs clean and moist.

20

Pupil

The little dark circle is the center of each eye. Allow light into the eye

21

Iris

Controls how much light needs to be in.

22

Lens

Focus as light comes through.

23

Retina

Send signals to the brain.

24

Optic Nerve

Carries the image to the brain.

25

Cornea

Covers our eyes. Clear skin nerve cells are cells in our brain