Electromagnetic Spectrum

Question 1

What part of the electro magnetic spectrum can only humans see?

Answer 1

Visible light 🔆

Question 2

Colours of visible light in order from shortest wavelength to longest

Answer 2

Red ❤️ Orange 🍊 Yellow 💛 Green 💚 Blue 💙 Indigo 💜 Violet 🍇

Question 3

How did Herschel discover Infra Red?

Answer 3

When using coloured filters on his telescope 🔭 he noticed a change in temperature depending on the colour. He used a prism to break up the visible light and used a thermometer to test the temperature of each colour. He found the temperature rose from violet to red. Temperature highest at red end of Visible light spectrum…. Infra red discovered.

Question 4

How did Ritter discover Ultra Violet?

Answer 4

Inspired by Herschel, Ritter tried to find invisible rats at the Violet end of the spectrum. Part of the experiment involved the use of Silver Chloride which turns black when exposed to light. The colour change happened fasted when exposed to invisible Ray’s at the Violet end

Question 5

Dangers of X-Rays

Give 2

Answer 5

Can cause Mutations in DNA
Causes lower immunity
Some parts of body absorb X-rays

Question 6

Dangers of Gamma rays

Give 2

Answer 6

Can penetrate the body
Can cause mutations in DNA
Can cause cancer

Question 7

Dangers to Ultra Violet

Give 2

Answer 7

Can cause mutations in DNA
Can damage eye sight
Can lead to cancer

Question 8

Uses of X-rays

Give 2

Answer 8

Used in airports to detect hidden objects
Hospital uses
Photograph production

Question 9

3 most dangerous electromagnetic waves

Answer 9

Ultra Violet
Gamma Rays
X-Ray’s