Edexcel Physics IGCSE - Topic 3: Waves

________ waves oscillate perpendicular to the direction of wave travel

longitudinal waves oscillate _________ to the direction of wave travel

What is the formula for calculating the speed of a wave?

• speed = frequency / wavelength

• frequency = speed * time

• time period = speed / wavelength

• speed = frequency * wavelength

The law of reflection says that the angle of incidence ______ the angle of reflection

What are the main groups of the electromagnetic spectrum in order of decreasing wavelength and increasing frequency?

What is an example of a use of microwaves?

• Sterilising surgical equipment

• transmitting wifi signals

• chilling food

• conventional photography

What is an example of a use of UV radiation?

• Sterilising surgical equipment

• transmitting wifi signals

• Making images of the body

• People use it to get a tan

time period = 1 / ______

the equation for refraction is: n = ___ i / ___ r

refractive index tells you

• how many waves will pass a point per second

• how much slower waves will travel in the new medium

• What direction light will go in when it reflects

• How dense the material is