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x Standard Grade Physics > SPACE Signals From Space > Flashcards

SPACE Signals From Space Flashcards

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0
Q

Define galaxy

A

Large cluster if stars and dusts that is spinning and travelling

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1
Q

Define universe

A

Many galaxies separated by empty space

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2
Q

Define star

A

Large ball of matter (ball of gases) that is under going nuclear fusion and emitting heat and light

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3
Q

Define sun

A

Our solar systems star

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4
Q

Define solar system

A

Central star orbited by plantes

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5
Q

Define planet

A

Large ball of matter that orbits a star, reflectin flight and emitting no energy

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6
Q

Define moon

A

An object which orbits a planet and reflects light

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7
Q

How long does it take light to reach the earth from the sun

A

8 minutes

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8
Q

How long does it take light to reach the earth from the nearest star

A

4.3 years

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9
Q

What is the nearest star called?

A

Proxima Centauri

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10
Q

How long does it take light to reach the earth from the edge of the galaxy?

A

100,000 years

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11
Q

What is a light year?

A

The distance traveled by light in one year.

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12
Q

What happens when weight light is shone through a prism

A

The white lights splits into a spectrum

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13
Q

All colours have different ____ and _____.

A

Wavelengths and frequencies

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14
Q

Place green red and blue in order of wavelength

A

Red (longest) green blue

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15
Q

Name colours in spectrum

A

Red, orange, yellow, green, blue, indigo and violet

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16
Q

Which light is more refracted, blue or red?

A

Blue

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17
Q

Why is deduction of spectrum useful for classifying elements?

A

Each element has an individual line spectra

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18
Q

Different radiation in the electromagnetic spectrum have different ______.

A

Wavelength

19
Q

Why are different telescopes/detectors needed for different types of radiation?

A

Different waveleghtn

20
Q

Give a detector for gamma rays

A

Geiger muller tube

21
Q

Give a detector for x rays

A

Photographic film

22
Q

Give a detector for ultraviolet

A

Fluorescent paint

23
Q

Give a detector for visible light

A

Eye

24
Q

Give a detector for infrared

A

Blackened thermometer

25
Q

Give a detector for microwaves

A

Aerial

26
Q

Give a detector for TV and radio

A

Aerial

27
Q

Give electromagnetic series

A

Gamma, x, ultraviolet, visible, infrared, microwaves, tv, radio

28
Q

Which radiation has shortest wavelethg?

A

Gamma

29
Q

Which radiation has longest wavelength?

A

TV and radio

30
Q

Which radiation has highest frequency

A

Gamma

31
Q

Which radiation has lowest frequency

A

TV and radio

32
Q

How are visible rays magnified?

A

Optical refraction telescope

33
Q

How are radio waves detected?

A

Radio telescopes

34
Q

What does a basic telescope consist of?

A

An objective lean, and eye piece and a light tight tube

35
Q

GO AN LOOK AT RAY DIAGRAM

A

Go noooooooow

36
Q

What does the objective lens do?

A

Brings e light from a distant object to a focus partway down the tube

37
Q

What does the eye piece lens do?

A

Magnifies the image (is a convex lens) which is upside down,

38
Q

What does the eyepiece do?

A

Acts as a magnifying glass

39
Q

Why is a light tight tube used?

A

To cut out all light from other sources

40
Q

What happens with a larger diameter of the objective lens?

A

The more light it collects and therefore the brighter the image

41
Q

Magnification=

A

Height of image from eyepiece lens/height of image from objective lens

42
Q

The ______ lens produces an image which is magnified by the ______

A

Objective, eyepiece

43
Q

The brightness of an object depends on

A

The diameter if the objective lens

44
Q

Telescopes can be deigned to collect _____, _____ and _______.

A

Radio waves, infrared and ultraviolet

x Standard Grade Physics (29 decks)

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