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WorksheetsWaves Summary Questions
Total questions: 28
Worksheet time: 15mins
How is light and sound similar? Choose all that apply.
They both transfer energy.
They are both waves.
They both have particles moving perpendicular to direction of wave.
They can both travel through empty space (vacuum).
Light refraction is the bending of light using different density mediums.
Can sound be refracted?
Yes
No
Which way will the sound bend?
Upwards
Downwards
Which way will the sound bend?
Upwards
Downwards
The particles in transverse waves move ___________ to the direction of the wave.
perpendicular
parallel
The particles in longitudinal waves move ___________ to the direction of the wave.
perpendicular
parallel
Are radio waves sound waves?
Yes they are.
No they are EM waves.
Does a bicycle reflector use reflection or refraction to achieve this 180° change in direction?
Reflection
Refraction
What are the conditions total internal reflection to occur? Choose all that apply.
The angle of incidence must be smaller than the critical angle.
The light must be moving from a less dense to a more dense medium.
The light must be moving from a more dense to a less dense medium.
The angle of incidence must be greater than the critical angle.
What is the critical angle for glass?
42°
45°
67°
82°
This device can be used for seeing around corners and over walls.
Telescope
Periscope
Microscope
Stethoscope
These items are all ...
(star, fire, bioluminescent animal, light bulb)
Luminous
Fluorescent
What causes refraction?
When a wave enters a medium of different density.
When a wave enters a medium of different size.
Does light go faster or slower in a more dense medium?
Faster
Slower
Same speed
EM Spectrum
Are radio waves or gamma waves faster?
Gamma
Radio
Same speed
What is the normal line?
The line perpendicular to the surface of the medium.
The line parallel to the incident ray.
When light moves from a
less dense to a more dense
medium, it bends __________ the normal.
towards
away from
When light moves from a more dense to a less dense medium, it bends ____________ the normal.
towards
away from
How can a ray box be dangerous?
The light is powerful and can burn you.
The ray box gets hot and can burn you.
Optical fibre uses ...
Reflection
Total Internal Reflection
How long does it take sunlight to reach Earth?
8 minutes
8 days
How long does it take light to travel from the Earth to the moon?
1 second
1 day
How long does it take light to travel from Earth to Pluto?
5 seconds
5 hours
Penetration ability of EM waves depends on ... (choose all that apply)
amplitude
frequency
material of medium
What is penetration ability?
Ability for a wave to bend around objects.
Ability for a wave to move through objects.
Which waves are best for long distance communication?
Radio and micro waves.
X-rays and gamma waves
Which light can pass through the atmosphere. (Choose all that apply).
Microwaves
Visible light
X-rays
Gamma waves
What is fluorescent material?
Material that glows in the dark.
Material that glows under UV light.
