Wave Properites
Light Behaviours
The EM Spectrum
Vocabulary Blitz
Diagram Challenges
Vocab 2
100
What do we call the highest point of a transverse wave?
The crest.
100
What is the line drawn perpendicular to a surface called in a reflection diagram?
The normal line.
100
Which type of electromagnetic wave has the longest wavelength?
Radio waves
100
What do we call the bottom point of a wave?
Trough
100
Draw and label a diagram of a transverse wave, including the crest, trough, rest position, amplitude, and wavelength.
100
Which term describes how tall a wave is from the rest position to a crest?
Amplitude
200
What unit is frequency measured in?
Hertz (Hz), or waves/second
200
What does the Law of Reflection state?
The angle of incidence = the angle of reflection
200
Which EM wave can cause sunburns?
Ultraviolet (UV) rays.
200
What is the distance from one trough to the next trough called?
Wavelength
200
Label a diagram of reflection (there should be five terms labeled)
200
What type of wave has particles moving perpendicular to the wave direction?
Transverse
300
If a wave’s frequency increases, what happens to its wavelength?
The wavelength decreases.
300
Why does a red shirt appear red under white light?
It reflects red wavelengths and absorbs all other colours.
300
List the EM waves from lowest to highest energy.
Radio → Microwave → Infrared → Visible → Ultraviolet → X-ray → Gamma.
300
What do we call the number of wave cycles that pass a point each second?
Frequency
300
What is the angle of reflection for the following diagram?
67
300
Define a medium in terms of waves.
The material through which a wave travels.
400
A wave has an amplitude of 2 cm. If you double the amplitude, what happens to the energy?
The energy increases (greater amplitude = more energy)
400
Describe the difference between reflection and refraction, and give an example of refraction happening.
Reflection = bouncing off a surface; refraction = bending when entering a new medium.
Example: a pencil appearing bent in water.
400
Explain why gamma rays have more energy than visible light.
Gamma rays have higher frequency, which gives them much more energy.
400
Define a compression wave.
The type of wave that moves with particles pushing parallel to the direction of the wave.
400
Predict which way the ray of light bend when it passes from air (a fast medium) into water (a slow medium)
Towards the normal
400
What kind of radiation vibrates both electrical and magnetic fields?
Electromagnetic radiation
500
What is the frequency of waves passing under a dock if there are 21 waves in 7 seconds?
3 Hz / 3 Hertz
500
Light travels from air (fast medium) into water (slow medium). Will it bend toward or away from the normal?
* You may draw a diagram
Toward the normal.
500
Describe one technological application of radio waves.
Radio, television, wifi, MRI machines
500
Define absorption in the context of light behaviour.
When light energy is taken in by a material and not reflected or transmitted.
500
What is the wavelength and the amplitude of the following graph? (include units)
Wavelength = 6 m
Amplitude = 2 cm
500
What is the name of energy that radiates as electromagnetic waves, including visible and invisible radiation?
Radiant energy