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Science > Physics 1 > Flashcards

Physics 1 Flashcards

1
Q

What are objects called when they don’t produce their own light? How do we see them?

A

Non luminous they reflect light

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2
Q

What is light?

A

A form of radiant energy

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3
Q

What part of light do our eyes react to?

A

Visible light

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4
Q

What is the electro magnetic spectrum?

A 
High to low
Gamma radiation
X-rays
Ultra violet
Visible
Infra red
Microwave
Radio
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5
Q

What is the colour spectrum?

A 
Violet
Indigo 
Blue
Green
Yellow
Orange
Red
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6
Q

How fast does light travel?

A

300,000 km/per second

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7
Q

How does light travel? What is it called?

A

In straight lines. It never bends. It’s called the rectilinear propagation of light

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8
Q

Remember that light doesn’t need a medium to travel though

A

It can travel through space (vacuum)

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9
Q

What are the three things light can do?

A

Be absorbed reflected and transmitted

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10
Q

Something that produces its own light

A

Luminous

Sun

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11
Q

The production of light due to high temperature

Example

A

Incandescence

Light bulb

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12
Q

The process of producing light by passing an electric current through a gas
Ex

A

Lightning

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13
Q

Production of light by the absorption of ultra violet light resulting in the emission of visible light over an extended period of time
Ex

A

Phosphorescence

Glow in the dark toys

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14
Q

The immediate emission of visible light as a result of the absorption of ultra violet light
Ex
Detergent

A

Fluorescence

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15
Q

The direct production of light as the result of a chemical reaction with little or no heat produced

A

Chemiluminescence

Glow stick

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16
Q

The production of light in living organisms as the result of a chemical reaction with little or no heat produced

A

Bioluminescence

Glow worms

17
Q

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

A

Triboluminescence

Rubbing Quartz crystals together

18
Q

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

A

Light emitting diode

Christmas lights

19
Q

Transparent

Example

A

All or most of the light is transmitted

Window glass

20
Q

Translucent

Example

A

Only some light is transmitted while the rest is absorbed or reflected
Wax paper

21
Q

Opaque

Example

A

No light is transmitted

Brick wall

22
Q

What are the two laws of reflection?

A
  1. The angle of incidence always equals the angle of reflection
  2. The incident Ray, the normal , and the reflected Ray all lie on the same plane.
23
Q

What are the characteristics of images?

A 
S size (height)
A attitude (upright or inverted)
L location: distance form mirror to image
T type (real or virtual)

Science (8 decks)

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