White light is made of what colours? List in order.
ROY G BIV (red, orange, yellow, green, blue, indigo and purple
100
What is the trough?
The lowest point of the wave
100
Model?
A way of representing something in order to understand it better and to make predictions
100
What are two types of waves that travel through a medium?
Transverse and compression waves
100
What are the additive primary colours?
Red, blue and green
200
Why does grass appear green?
It appears green because the colour green is refracted while all other colours are absorbed
200
What is the crest?
The highest point on a wave
200
Refraction?
Is the bending or changing direction of a wave as it passes from one type of matter to another
200
What is the difference between a transverse wave and a compression wave?
A transverse wave has matter in the medium moving up and down perpendicular to the direction that the wave travels and a compression wave has matter in the medium moving back and forth along the same direction that the wave travels
200
Which colour has a lower frequency: Orange or green? Why?
Orange because it has a lower wavelength?
300
What has to happen in order to see a rainbow?
It needs to raining and sunny because the water droplets that fall act as prisms in the sky causing white light to separate creating a never-ending rainbow
300
What is wavelength?
The distance between from crest to crest or from trough to trough
300
Frequency? What is it measured in?
Number of repetitive motions, or oscillations, that occur in a given time. It is measured in hertz (Hz)
300
Which types of waves in the electromagnetic spectrum have wavelengths shorter than visible light?
Ultraviolet, X rays and Gamma rays have shorter wavelengths than visible light
300
Name all the waves in the electromagnetic spectrum
Radio waves, microwaves, infrared waves, ultraviolet waves, x rays, gamma rays
400
Why is it good to wear black during cold days?
Because black absorbs most colours and keeps heat in
400
What is amplitude?
It is the height of a wave crest or depth of a wave trough, as measured from its rest position
400
What is the visible spectrum?
The visible spectrum is a range of colours or frequencies of visible light
400
Explain how ultraviolet waves can be good AND bad for you.
Good: Ultraviolet waves are used to kill bacteria found in food, water and medical tools. Also helps your body with Vitamin D
Bad: Too much exposure from ultraviolet waves (Vitamin D) can lead to skin cancer or sun burns.
400
What is inverse relationship?
Inverse relationship is when one value increases as the other decreases
500
If white light is refracted through one prism but violet is blocked before the light enters the second prism, what will happen to the light? Why?
White light will not be formed because all colours (ROY G BIV) are needed to form white light
500
What is a wave?
A disturbance or movement that transfers energy through matter or space without causing any permanent displacement
500
What is electromagnetic radiation?
Electromagnetic radiation is the transmission of energy in the form of waves that extend from the longest radio waves to the shortest radio waves
500
What are radio waves and what are its uses?
Radio waves are a type of electromagnetic radiation that has the longest wavelength and lowest frequency compared to all the other types. Radio waves are used in television broadcasting or radios
500
What 2 types of waves are a combination of transverse and compression waves?