Sources of Light and Nature

Question 1

frequency

Answer 1

number of wavelengths per unit of distance
- the higher the frequency the more shorter the wavelengths and highger energy

• the lower the frequency the bigger wavelengths and lower energy

Question 2

most energy wave vs lowest energy wave

Answer 2

gamma rays have the most
Radio waves have the least

Question 3

Visible light?

Answer 3

when all the wavelenghths are put together and reach an object where only one ray is reflected into eye.

Question 4

Violet vs Red

Answer 4

Violet has the shortests rays (faster to the eye)
Red has the longest rays (slower to the eye)

Question 5

The 2 sources of light

Answer 5

Natural and artificial light

Question 6

Luminous vs non-luminous

Answer 6

luminous produces its own light
Non Luminous reflects light

Question 7

The 2 types of light emissions

Answer 7

Incandescent: light emmited by a very hot object
Luminescent: light produced by a non heated object

Question 8

Fluorescence?

Answer 8

light that is emitted when exposed to UV light
- in bulbs when the electrons meet with mercury atoms that release UV energy
- the phosphor coating on the bulb absorbs this energy and lights up the bulb

Question 9

Phosphorescence

Answer 9

storing energy from a light source and can glow for a long time
- glow stickers

Question 10

Chemeluminecence

Answer 10

light generated from a chemical reaction
- glow sticks

Question 11

Bioluminecent

Answer 11

Light produced by living organisms
(biochemical reaction)