Wave basics
What is a moving thing that repeats called?
A wave
What is the number of waves that pass a point in one second called?
Frequency
Which electromagnetic waves are used for radio and TV communication?
Radio waves
What happens to white light when it passes through a prism?
It splits into different colours.
What scientist studies space while using light from stars?
Astronomer
What is the highest point of the wave called?
The crest
What is the unit that is used to measure frequency?
Hertz
Which electromagnetic waves are used to heat food?
Microwaves
What happens to most light when it hits a white object?
It is reflected
What medical profession uses x-ray imaging?
Radiologist or maybe an x-ray technician
What is the lowest point of a wave?
The trough
If frequency increases, what happens to wavelength?
Decreases
Which electromagnetic waves are felt as heat and used in thermal cameras?
Infrared waves
Why do we see objects as certain colours?
Because they reflect some colours of light and absorb others.
Who designed communication systems using radio waves?
Electrical engineer
What is the distance from one crest to the next crest called?
Wavelength
Higher frequency waves carry more what?
Energy
Which part of the electromagnetic spectrum can humans see?
Visible light
Which colour of light scatters more in general? Blue or red?
Blue light
What type of scientist, learns about light and lasers?
Optical physicist
What is the height of a wave measured from rest position to crest or trough called?
Amplitude
It gets lower
Which electromagnetic waves are used in hospitals to take pictures of bones?
X-Rays
Why does the sky appear blue during the day?
Blue light scatters more than other colours in the atmosphere.
Who works with satellites and electromagnetic signals around earth?
Aerospace engineer