Physics- Light and Optics- Chp 11

Question 1

Significant digit

Answer 1

-

Question 2

Scientific notation

Answer 2

H

Question 3

Crest

Answer 3

R

Question 4

Trough

Answer 4

J

Question 5

Amplitude

Answer 5

G

Question 6

Nodes

Answer 6

H

Question 7

Line of rest

Answer 7

H

Question 8

Wavelength

Answer 8

Looks like

Question 9

Frequency

Answer 9

G

Question 10

Electromagnetic spectrum

Answer 10

The classification of electromagnetic waves by energy.

Question 11

Medium

Answer 11

Any physical substance through which energy can be transferred.

Question 12

Radiant energy

Answer 12

F

Question 13

Speed of light

Answer 13

C=3.0x108

Question 14

Luminous light

Answer 14

Produces its own light. Examples are the sun, a lit match and flashlight when it is on.

Question 15

Incandescent

Answer 15

Is a source of luminous light that is the production of light as a result of being heated up. 5%-10% of the electricity going through the filament is actually converted into visible light. Light bulbs are an example.

Question 16

Fluorescent

Answer 16

Immediate emission of visible lighting as a result of the absorption of UV light. Mercury vapour emits UV light when current is applied. Coating is fluorescent-> emits visible light. look at note

Question 17

Chemioluminescent

Answer 17

The direct production of light produced from a chemical reaction. It is the only source of light that produces almost no heat. An example is a glow stick.

Question 18

Bioluminescent

Answer 18

Production of light in a living organism as a result of a chemical reaction. Examples are fireflys,

Question 19

Triboluminescent

Answer 19

Production of light from friction as a result of scratching, crushing or rubbing certain crystals.

Question 20

Phosphorescent

Answer 20

Light that is produced by the slow release of light energy that was the result of UV light being absorbed. An example is glow in the dark toys.

Question 21

Electric discharge

Answer 21

The process of producing light by passing an electric current through a gas (causing it to glow). Examples include Lighting and Neon signs (&a other gases).

Question 22

LED

Answer 22

Light produced as a result of an electric current flowing in semiconductors.

Question 23

Non luminous

Answer 23

Does not produce its own light and can only be seen by reflecting light. Examples include the moon and a mirror.

Question 24

Light ray

Answer 24

A line or arrow on a diagram representing the direction and path that light is traveling.

Question 25

Electromagnetic wave

Answer 25

A wave that had both electric and magnetic parts, does not require a medium, and travels at the speed of light.

Question 26

Specular reflection

Answer 26

(Smooth surfaces- mirror) parallel beams of light are reflected in identical patterns. *look at diagram in note*

Question 27

Diffuse reflection

Answer 27

(Irregular surfaces) parallel beams of light are reflects in different direction. *look at diagram in note*

Question 28

"SALT"

Answer 28

Size- Larger, Smaller or the same. size compare to the original object. Attitude- Upright or Inverted Location- Closer, Further Away or the same as the object. Type- Virtual or Real Real appears inverted and virtual appears upright.

Question 29

Transparent

Answer 29

Allows light to easily pass through it and allows objects behind it to be clearly seen (ex. Air, glass).

Question 30

Translucent

Answer 30

Allows some light to pass through but does not allow you to clearly see objects behind it (ex. Frosted glass).

Question 31

Opaque

Answer 31

Does not allow any light to pass through it and can not see objects behind it (ex. Cardboard).

Question 32

Reflection

Answer 32

The bouncing back of light energy from a surface that it was projected on. *Look at note how to properly draw mirrors*

Question 33

Laws of reflection

Answer 33

H

Question 34

Incident ray

Answer 34

The incoming ray that strikes a surface

Question 35

Point of incident

Answer 35

D

Question 36

Reflected ray

Answer 36

The ray that bounces off a reflective surface.

Question 37

Angle of incidence

Answer 37

The angle between the incident ray and the normal

Question 38

Angle of reflection

Answer 38

The angle between the reflected ray and the normal

Question 39

Normal

Answer 39

The perpendicular line to a mirror surface.

Question 40

Convex (diverging) mirror

Answer 40

A mirror shaped like part of the surface of a sphere in which the Outer surface is reflective.

Question 41

Concave (converging) mirror

Answer 41

A mirror shaped like part of the surface of a sphere in which the inner surface is reflective.

Question 42

Centre of Curvature(C)

Answer 42

The centre of the sphere whose surface was used to make the mirror

Question 43

Focus (F)

Answer 43

The point at which light rays parallel to the principal axis converge when they are reflected off a concave mirror.

Question 44

Vertex (V)

Answer 44

The point where the principal axis meet the mirror.

Question 45

f=focal length

Answer 45

The distance between the vertex and the focus

Question 46

R=radius of curvature

Answer 46

The distance from the vertex to the centre of curvature. It is twice the focal length

Question 47

Refraction

Answer 47

Actually do