CP5d Using The Short Wavelengths

Question 1

Uses of Ultraviolet

Answer 1

Disinfect water by killing microorganisms in it

Flourescent materials are often used in security markings - they are only visible when ultra violet light shines on them

Question 2

Flourescence

Answer 2

Absorbing radiation of one wavelength an re-emitting the energy at a different wavelength

Question 3

Uses of X-rays

Answer 3

Can pass through muscles and fat but bone absorbs some X-rays. This means X-rays can be used to make images of inside the body

Can examine the insides of metal objects

Can inspect luggage in airport security scanners

Question 4

Uses of Gamma Rays

Answer 4

Can kill cancer cells in radiotherapy

Can detect cancer (A chemical that emits gamma rays is injected into the blood. The chemical is designed to collect inside cancer cells. A scanner outside the body then locates the cancer.

Sterilise food and surgical instruments by killing potentially harmful microorganism

Question 5

Gamma rays (property)

Answer 5

Gamma rays can pass through all the materials in the body