P11

Question 1

What do all electronic waves have in common

Answer 1

Same speed

All transverse waves

All can travel in a vacuum

Question 2

The electronic spectrum is

Answer 2

Radio waves, micro waves, infrared waves, visible light, ultraviolet waves, x rays , gamma waves

In order of decreasing wavelength

In order of increasing frequency and energy

Question 3

Labelling a transverse graph

Answer 3

Peak

Trough

Wavelength

Amplitude

Question 4

What is refraction

Answer 4

When a plane waves cross a boundary at non-zero angle to the boundary, each wavefront experiences a change in speed and direction

The refracted waves and the incident waves have the sam frequency, but they travel at different speeds, so they have different wavelengths

It occurs at a boundary between two different materials as the speed and wavelength of the wave changes at the boundary