Optics quiz

Question 1

What is Bioluminescence

Answer 1

Bioluminescence is light produced from a chemical reaction by a living thing.
Examples of bioluminescent species includes:
• Blue­green stainer fungi
• other fungi species
• fireflies / lightning bugs
• deep ocean fish species
• algae
• bacteria

Question 2

What is Fluorescent light

Answer 2

Fluorescent light is light from some substances when they are exposed to
electromagnetic radiation.

ex A fluorescent light bulb is a glass tube filled with a small
amount of a gas such as mercury vapour.

Question 3

What is Chemiluminescence

Answer 3

Chemiluminescence is light produced from a chemical reaction without a rise in
temperature.

ex a glowstick

Question 4

what is electric discharge

Answer 4

An electric discharge is for producing light in which an electric current
goes through the air or another gas, such as neon.

Lightning is one example of an electric discharge.

Question 5

what is Incandescent light

Answer 5

Incandescent light is light that is produced by an object, such as a metal, that is at a very
high temperature.

Question 6

Electroluminescence

Answer 6

Electroluminescence is a method for producing light in which an electric current passes through a solid semiconductor.

Question 7

What is the law of reflection

Answer 7

Angle of incident=Angle of reflection

Question 8

what is opaque

Answer 8

Opaque - objects absorb and reflect light and nothing is transmitted.
Example desk, floor.

Question 9

what is translucent

Answer 9

Translucent - these transmit some light, but you cannot see what is on the
other side of the object. Example is a frosted window.

Question 10

what is transparent

Answer 10

1. Transparent - these absorb and reflect very little light, light is transmitted
   very easily through these objects. Examples are clear glass and clear plastic.

Question 11

what is a ray model

Answer 11

a diagram of rays travelling from the source outwards in all directions

Question 12

what is Phosphorescent Light

Answer 12

Phosphorescence light stores energy from a source of light

and then emit it slowly over a long period.

Question 13

what is a image and a optical device

Answer 13

a image is a reproduction of a object produced by a optical device like a mirror

a optical device is any technology that uses light

Question 14

regular reflection vs diffuse reflection

Answer 14

The light rays strike a smooth surface and reflect in the same direction,
staying parallel to one another.

diffuse relfections
Light rays strike an uneven surface (rough) and are scattered in
different directions.

Question 15

what is color

Answer 15

color is how our brain interprets light

Question 16

what is light made up of

Answer 16

different wave lengths

Question 17

what property of wave length determines the colour of the light

Answer 17

the length of the wave
longest wave length color - red
shortest is blue or violet light

Question 18

what happens when you combine the colors rgb

Answer 18

you get white

Question 19

what are the primary subtractive colors

Answer 19

cym

or cyan,yellow,mageneta

Question 20

what is color theory

Answer 20

Its how humans perceive color; and the visual effects of how colors mix, match or contrast with each other.