Q. State a use of X-rays.

Q. State a use of UV radiation.

Q. State a use of visible light.

Q. State a use of infrared radiation.

Q. State what else is infrared radiation known as?

Q. State a use of microwaves.

Q. State a use of radio waves.

Q. State what happens to the energy of electromagnetic waves as the frequency increases.

Q. State the speed of all electromagnetic waves in the air.

Q. Explain why there are different sections of the electromagnetic spectrum.

Q. State what is meant by the term refraction.

Q. On the diagram identify, the angle of incidence and the angle of refraction.

Q. On the diagram, identify the angle of incidence and the angle of reflection. Q. State the law of

reflection.

Q. Explain what would happen to the waves on the other side of the gap.

Q. Explain what would happen to the waves on the other side of the obstacle.

A. Photography; Lasers;TV images.

A. Detecting fake banknotes; Detecting fake identification;Tanning beds.

A. Detecting broken bones;Scanning airport luggage.

A. Cooking food; Mobile phone communications;Radar.

A. Heat radiationA. Healing muscle

injuries quicker. Medical thermograms.

A. 300 000 000 ms-1

A. Larger frequency means larger energy. Gamma has the biggest, radio & TV have the smallest.

A. Used in mobile, radio and TV communications

A. b = angle of incidencee = angle of refraction[angles are always between the rays and the normal]

A. Refraction is when light changes speed, wavelength and direction when travelling from one medium to another.

A. The different sections of the spectrum have different frequencies and wavelengths.

A. The waves would bend through but the wavelength would stay the same.

A. The angle of incidence = the angle of reflection

A. x = angle of incidencey = angle of reflection[angles are always between the rays and the normal]

A. The waves would bend around but the wavelength would stay the same.