Section 3 1-10

Question 1

Wave

Answer 1

Oscillations that transfer energy without transferring matter

Question 2

Electromagnetic radiation

Answer 2

Transverse waves comprised of electric and magnetic fields at right angles to each other which can travel without a medium. All EM Waves Travel at the same speed in a vacuum

Question 3

Electromagnetic spectrum

Answer 3

The full range of electromagnetic radiation from wavelength 10^-15m to 10^4m
Gamma (shortest wavelength), X-ray, Ultraviolet, Visible, Infra-red, Microwave, Radio

Question 4

Longitudinal wave

Answer 4

The oscillations are parallel to the direction of energy transfer

Question 5

Transverse wave

Answer 5

The oscillations are perpendicular to the direction of energy transfer

Question 6

Sound wave

Answer 6

An example of a longitudinal wave

Question 7

Reflection

Answer 7

The wave ‘bouncing off’ of a surface. The angle of incidence = angle of reflection

Question 8

Refraction

Answer 8

Waves undergo a change of direction when they cross an interface or boundary. Waves do not refract if they travel along the normal

Question 9

Frequency

Answer 9

No. of complete waves per second, measured in Hertz (Hz)

Question 10

Diffraction

Answer 10

The spreading out of waves as they go past an edge or through a gap