Physics Flashcards
(9 cards)
1
Q
How far can a beam of infrared radiation travel?
A
From the ground to a satellite.
2
Q
Why are BT towers so tall?
A
Because Microwaves can only travel in straight lines so the towers have to avoid other buildings.
3
Q
Why do microwaves heat things up?
A
Microwaves cause water particles to vibrate which in turn heats up the object.
4
Q
What type of radiation carries mobile phone signals?
A
Microwaves?
5
Q
In sound waves, the higher the sound the _______ the frequency.
A
Greater
6
Q
A sound wave is an example of what type of wave?
A
A longitudinal wave.
7
Q
All vibrating objects produce sound waves, how are they are transmitted to the listeners ear?
A
by vibrating the air particles.
8
Q
What are reflected sounds called?
A
Echos
9
Q
Which surfaces are best at reflecting sounds?
A
Hard surfaces.
