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Science > Physics- Light and Optics- Chp 11 > Flashcards

Physics- Light and Optics- Chp 11 Flashcards

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1
Q

Significant digit

A

-

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2
Q

Scientific notation

A

H

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3
Q

Crest

A

R

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4
Q

Trough

A

J

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5
Q

Amplitude

A

G

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6
Q

Nodes

A

H

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7
Q

Line of rest

A

H

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8
Q

Wavelength

A

Looks like

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9
Q

Frequency

A

G

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10
Q

Electromagnetic spectrum

A

The classification of electromagnetic waves by energy.

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11
Q

Medium

A

Any physical substance through which energy can be transferred.

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12
Q

Radiant energy

A

F

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13
Q

Speed of light

A

C=3.0x108

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14
Q

Luminous light

A

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

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15
Q

Incandescent

A

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.

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16
Q

Fluorescent

A

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

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17
Q

Chemioluminescent

A

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.

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18
Q

Bioluminescent

A

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

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19
Q

Triboluminescent

A

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

20
Q

Phosphorescent

A

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.

21
Q

Electric discharge

A

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).

22
Q

LED

A

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

23
Q

Non luminous

A

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

24
Q

Light ray

A

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

25
Q

Electromagnetic wave

A

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

26
Q

Specular reflection

A

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

27
Q

Diffuse reflection

A

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

28
Q

“SALT”

A

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.

29
Q

Transparent

A

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

30
Q

Translucent

A

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

31
Q

Opaque

A

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

32
Q

Reflection

A

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

33
Q

Laws of reflection

A

H

34
Q

Incident ray

A

The incoming ray that strikes a surface

35
Q

Point of incident

A

D

36
Q

Reflected ray

A

The ray that bounces off a reflective surface.

37
Q

Angle of incidence

A

The angle between the incident ray and the normal

38
Q

Angle of reflection

A

The angle between the reflected ray and the normal

39
Q

Normal

A

The perpendicular line to a mirror surface.

40
Q

Convex (diverging) mirror

A

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

41
Q

Concave (converging) mirror

A

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

42
Q

Centre of Curvature(C)

A

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

43
Q

Focus (F)

A

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

44
Q

Vertex (V)

A

The point where the principal axis meet the mirror.

45
Q

f=focal length

A

The distance between the vertex and the focus

46
Q

R=radius of curvature

A

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

47
Q

Refraction

A

Actually do

Science (4 decks)

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