Light

Question 1

Light

Answer 1

Electromagnetic radiation within a very small portion of the electromagnetic spectrum. It is in the visible spectrum, and referred to as visible light.

Question 2

Beam

Answer 2

A ray of light.

Question 3

Ray

Answer 3

A straight line of light (and heat) that comes from the Sun/luminous body, or passing though a small opening.

Question 4

Energy

Answer 4

The property that must be transferred to an object in order to make heat or energy.

Question 5

Luminous

Answer 5

A body that produces its own light (E.g. the Sun).

Question 6

Non-Luminous

Answer 6

A body that reflects the light from luminous bodies (E.g. the Moon).

Question 7

Speed of light

Answer 7

Approximately 300000km/s.

Question 8

Shadow

Answer 8

A dark area, from a light source, that is covered by an opaque object

Question 9

Electromagnetic Spectrum

Answer 9

Complete range of wavelengths radiated as electric and magnetic fields.

Question 10

Radio Waves

Answer 10

Low energy electromagnetic waves with a much lower frequency and longer wavelength than visible light.

Question 11

Infra-red Rediation

Answer 11

Invisible radiation emitted by all warm objects, commonly known as heat.

Question 12

Ultraviolet Radiation

Answer 12

Invisible light that contains Vitamin D, however too much exposure to it can cause sunburn.

Question 13

X-Rays

Answer 13

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

Question 14

Gamma rays

Answer 14

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

Question 15

Reflection

Answer 15

Bouncing off the surface of a substance.

Question 16

Scattering

Answer 16

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

Question 17

Transplant

Answer 17

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

Question 18

Translucent

Answer 18

Describes the substance that allows some of the light through it, and the rest reflected back.

Question 19

Opaque

Answer 19

Describes a substance that does not allow any light to pass through it.

Question 20

Lateral Inversion

Answer 20

Reversed sideways, mainly used on the front of an ambulance.

Question 21

Refraction

Answer 21

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

Question 22

Photon

Answer 22

A particle such as a quantum of light or electromagnetism