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Vocabulary
Sources of light
Properties of Light
The Visible Spectrum
The Electromagnetic Spectrum
100
A shadow has 2 parts. The area where light can reach is called ________. The area that some light can reach is called _______.
What is umbra and penumbra?
100
Objects that emit light are said to be _______. The sun is the most important natural source of this type of light.
What is luminous?
100
Light is a form of ________ that can be detected by the human eye.
What is energy? (Thermal energy)
100
The 6 colours in the visible spectrum create this colour of light when they are mixed together.
What is white light?
100
These are the high and low points on a wave.
What is the crest and trough?
200
When an animal uses a chemical reaction to make itself luminous, it is called __________.
What is bioluminescence?
200
The moon is non-luminous, meaning that it does not emit light but only ______ light from other sources.
What is reflects?
200
This type of light is part of the energy that comes from the sun and can be broken into 6 colours.
What is visible light? ROYGBV
200
Isaac Newton used this device to produce the visible spectrum.
What is a prism? **Double points: How did Newton prove that visible light (white light) is made up of different colours and that a prism only separates the colours**
200
This type of energy move in waves, is usually invisible to the human eye, and makes up the electromagnetic spectrum.
What is radiant energy? ** Double points: Name a type of radiant energy. **
300
This is the process of changing chemical energy into light energy with little or no change in temperature.
What is chemiluminescence?
300
The process of emitting light because of electricity passing through a gas.
What is electric discharge? ** Double points: Give an example of electric discharge in nature. **
300
Light moves in this direction.
What is straight.
300
When light moves from one material to another (like travelling through a prism), it changes speed and bends. This is known as______________.
What is refraction?
300
This is the distance between two adjacent troughs or two adjacent crests.
What is wavelength?
400
Transparency has 3 classifications: __________, __________, and ____________.
What is transparent, translucent, and opaque. **Double points: Give a definition and example for each term**
400
The process of emitting light for a short time after receiving energy from another source. An example of this is glow-in-the-dark stickers.
What is phosphorescence?
400
Visible and invisible parts of radiation from the sun make up this.
What is the electromagnetic spectrum?
400
This screen is reflecting what part of the visible spectrum?
What is blue?
400
When frequency increases, wavelength _______.
What is decreases?
500
A candle is an example of this process of emitting light.
What is incandescence?
500
The process of emitting light while receiving energy from another source. It uses both electric discharge and phosphorescence.
What is fluorescence?
500
Depending on the material that light strikes, it may be ______, ______, or _________.
What is reflected, transmitted, or absorbed? **Double points: give examples for types of materials that would cause light to be reflected, transmitted, or absorbed.**
500
An object is this colour when none of the colours in visible spectrum are reflected and this colour when all of the colours are reflected.
What is black and white?
500
Light is brighter when ________ is greater.
What is amplitude?