Waves Flashcards
What are the units of frequency
Hz
The distance form the crest to the crest of the next wave is called…
The wavelength
Light waves are _________ to the direction of _________ transfer
Perpendicular
Energy
To set up a diffraction experiment for light why would you need a very small gap?
Light has a small wavelength
What is the lowest frequency in the normal range of human hearing
20Hz
The faster an object vibrates…
…The higher pitched noise it makes
The bigger the vibrations when an object vibrates…
…the louder the sound it makes
Which of the following types of electromagnetic radiation has the highest frequency?
- microwaves
- gamma
- visible light
Gamma
Which of the following types of electromagnetic radiation has the longest wave length?
- infra-red
- X-rays
- microwaves
Microwaves
Which type of electromagnetic radiation travels at the greatest speed in a vacuum
They all travel at the same speed
How do signals travel through optical fibres
As infra-red radiation
What is an advantage of wireless communications
Wireless devices can be portable
Why are microwaves used for satellite communications
Because they are not refracted by the atmosphere
Which type of electromagnetic radiation is used when mobile phones communicate with their base stations
Microwaves
