HEALTH Using The Spectrum

Question 0

What are lasers used for in hospitals?

Answer 0

Eye surgery (laser eye correction), to remove birthmarks and remove cancerous tumours.

Question 1

What are lasers?

Answer 1

An intense beam of light that carries a lot of energy.

Question 2

What are X-rays used for?

Answer 2

To detect broken bones.

Question 3

Explain how X-rays work

Answer 3

A beam of X-rays are aimed at the patient because bones are denser than surrounding tissues it absorbs more X-rays. A shadow is therefore cast on the photographic film that is placed behind the patient. X-rays blacken the film and bones show up white so breakages show up black.

Question 4

Name a detector of X-rays

Answer 4

Photographic film

Question 5

What is infrared radiation?

Answer 5

Heat radiation with a wave length longer than that of visible light.

Question 6

What is infrared used for in hospitals?

Answer 6

Physiotherapists for muscle recovery. Thermal imaging eg tuners are warmer than surrounding tissue.

Question 7

What is ultraviolet?

Answer 7

A radiation with a wavelength shorter than that of visible light.

Question 8

What is ultraviolet used for in hospitals?

Answer 8

Skin problems (eg vitamin D deficiency)
Serialising medical equipment.

Question 9

What happens with excessive exposure to ultraviolet radiation?

Answer 9

Skin cancer can occur.

Question 10

What is computerised tomography?

Answer 10

Ct scans. Takes lots of little images (slices) to creat a large 3D X-ray. Much more accurate than normal X-rays.

Question 11

Los the spectrum in terms of wavelength

Answer 11

Gamma rays
X-rays
Ultraviolet
VISIBLE LIGHT
Infrared
Microwaves
Radio waves