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Flashcards in 7.3 Deck (23)
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1
Q

Spectrum

A

Rainbow band of colours that forms when a transparent prism detracts visible white light

2
Q

Big Bang theory

A

A theory of how the universe was formed based off of how everything was held at a very dense point that expanded and exploded to form the universe.

3
Q

Electromagnetic radiation

A
A type of energy that travels in waves. It is more commonly known as light.
Examples include:
-visible light
-radio waves
-microwaves
-ultraviolet radiation
-X-rays
4
Q

Electromagnetic spectrum

A

A scale that measures different types of electromagnetic energy.

5
Q

Spectroscope

A

A tool that separates light into ROYGBIV colours.

6
Q

Spectral lines

A

A series of dark lines that appear in the colours of a star. It is studied to discover what elements can be found in the star. Found in absorption spectra

7
Q

Spectral shifting

A

Red shift or blue shift
A movement to the left or the right of a spectral line’s original position in the spectrum of a light source that is stationary.

8
Q

Doppler effect

A

Like sirens
Closer is compressed waves, blue shift
Moving farther away is stretched out waves red shift

9
Q

Cosmic background radiation

A

A type of electromagnetic radiation that has an untraceable source.

10
Q

CoBE

A

Cosmic background explorer sattelite

Makes detailed maps of background radiation

11
Q

WMAP

A

Wilkinson microwave anisotropy probe

Makes more detailed maps using more precise measurements and made an enhanced map

12
Q

Wavelength

A

Repainted by the symbol lambda

Distance from two successive troughs or crests

13
Q

Waves

A

There’s must veenergey when waves are made
Some will travel really fast others may travel really slow
Will appear to move but energy carries the wave

14
Q

Crest

A

Top of a wavelength

15
Q

Trough

A

Bottom of a wavelength

16
Q

Displacement

A

Y axis of a wave graph

17
Q

Distance

A

X axis of a wave graph

18
Q

Amplitude

A

Represented by u it is the distance from the potoroos of rest to the crest

19
Q

Position of rest

A

Dashed line that is the mid point of waves

20
Q

Prism

A

Anything transparent that detracts light into ROYGBIV

21
Q

Slit

A

Concentarates the light

22
Q

Emission spectrum

A

A spectrum that consists of individual lines at characteristic wavelengths produced when light passes through an incandescent gas (hot)or a prisms
Aka
Bright line spectrum

23
Q

Absorption spectrum

A

Aka
Dark line spectrum
A continuous spectrum crossed by dark lines when lift passes through a non incandescent gas oil gas.