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science gr.10 > Physics quiz #1 > Flashcards

Physics quiz #1 Flashcards

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1
Q

Luminous

A

Produces its own light (eg. sun, flashlight)

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2
Q

Non-luminous

A

Does not produce its own light. Objects can only be seen using reflected light. (eg. trees)

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3
Q

Luminous Sources

A

1) Incandescence

2) Electric Discharge

3) Phosphorescence

4) Fluorescence

5) Chemiluminescence

6) Bioluminescence

7) Triboluminescence

8) Light Emitting Diode

9) Light Amplification by Stimulated Emission of Radiation (LASER)

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4
Q

Incandescence

A

When things give off light because they are hot. Any time a fuel is burned to produce light

Examples: Flashlight, fire, lantern

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5
Q

Luminescence

A

When light is given off by things that do not get
hot

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6
Q

Luminescence: Chemiluminescence

A

Light that is released during chemical reactions.

▪ Example: Glow Sticks

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7
Q

Luminescence: Bioluminescence

A

Light that is released during chemical reactions
in living things

Example: Fireflies

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8
Q

Luminescence:
Electric Discharge

A

When an electrical current being passed
through a gas results in light emission

▪ Example: lightning, neon lights

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9
Q

Luminescence: Fluorescence

A

A form of electric discharge

▪ Electric current !

an object absorbs ultraviolet light, visible light is immediately released
▪ Example: Fluorescent lights; electricity causes Hg
vapour to release UV light which is absorbed by
a fluorescent coating on the tube)

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10
Q

Luminescence:
Phosphorescence

A

UV light absorbs by an object, while visible light is released over time, causing objects to glow in dark conditions. The material stores the energy and releases it later.

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11
Q

Luminescence: Triboluminescence

A

When crushing crystals makes light
Eg. Rubbing crystals together

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12
Q

How does light travel

A

It travels in straight lines
It travels FAST
– A billion km/h
– 3 x 108 m/s

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13
Q

What is light

A

Light is ENERGY transmitted through
radiation (a method of energy transfer that does
not require a medium)
– It can travel through empty space – it does
not require a “medium”
Light is produced as
a form of energy in straight lines

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14
Q

Medium

A

any physical substance that acts as a carrier for the transmission of energy

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15
Q

The Electromagnetic Spectrum

A

Low-energy to high-energy
radio, microwave, infrared, visible, .ultraviolet, x-ray, gamma ray

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16
Q

colour wavelengths

A

Red light – the least
energetic, longest wavelength
* Violet light – the most
energetic, shortest wavelength

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17
Q

Light Ray

A

*A line on a diagram representing the direction
and path that light is travelling

18
Q

Mirror

A

Glass with a thin reflective film

19
Q

Incident Light:

A

Light emitted from a source that strikes an object

20
Q

Image:

A

Reproduction of an object through the use of light

21
Q

Reflection:

A

The bouncing back of light from a surface

22
Q

Mirror:

A

Any polished surface reflecting an image
and path that light is travelling

23
Q

The Ray Model of Light

A

A ray of light bounces off a plane mirror,
this is also defined as reflection.

24
Q

Laws of Reflection: Law #1

A

angle of incidence = angle of reflection

25
Q

Diffuse Reflection

A

Reflection off of
a rough, irregular dull surface

  • e.g. cover of a book, water surface with
    waves, paper
    parallel incident rays - reflected rays in different directions
26
Q

Regular/Specular Reflection

A

parallel incident rays

parallel reflected rays
* Reflection of light off of
a flat, smooth surface

  • e.g. mirror
27
Q

SALT for plane mirror

A

Characteristics of Images
in a Plane Mirror

Size:same

Attitude:upright

Location:same distance

Type:virtual

28
Q

Lateral Inversion:

A

the orientation
of an image in a plane mirror that is
backwards AND in reverse order

Images formed by plane mirrors are said to be
laterally inverted

29
Q

C – center of curvature

A

the centre of the sphere whose surface
has been used to make the mirror

30
Q

Concave mirror

A

A mirror that has a reflective surface that curves
inwards (i.e. “caves in”)
● Examples…
● car headlights
● Flashlights etc..

31
Q

focus

A

– Focus (the point thru which light rays parallel to the principle axes
converge when they are reflected from a curved mirror)

32
Q

PA - Principal Axis

A

(line through C & V to midpoint of mirror;

normal to the surface of the mirror)

33
Q

V – Vertex

A

(point where principle axis meets mirror)

34
Q

SALT beyond C

A

S- smaller
A- intverted
L- between C&F
T- real

35
Q

SALT at C

A

S- same size
A- inverted
L- at C
T- real

36
Q

SALT between C and F

A

S- bigger
A- inverted
L- beyond C
T- real

37
Q

SALT at F

A

no real image formed

38
Q

SALT inside F

A

S- larger
A- upright
L- behind mirror
T- virtual

39
Q
A
40
Q

SALT convex mirror

A

S- smaller
A- upright
L- behind the mirror
T- virtual

science gr.10 (5 decks)

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