2. How many waves does the electromagnetic spectrum consist of?8 1 7 9

3. All electromagnetic waves are:
Sound waves?
Low frequency waves?
Transverse waves?
Longitudinal waves?

4. What type of electromagnetic wave is emitted by hot objects?
Infra red
X rays
Gamma
Visible light

5. What is the lowest frequency wave in the electromagnetic spectrum?
Gamma
Visible light
Micro
Radio

6. Which electromagnetic wave is reflected by the ionosphere?
Microwaves
Radio waves
Visible light
Ultra violet

7. Which type of EM wave is used for night vision?
Visible light
Infra red
Ultra violet
X rays

8. Which electromagnetic wave is the rattlesnake able to detect which human cannot?
Visible light
Infra red
X rays
Micro waves

9. Which of the following is not a property of electromagnetic waves
They can all travel through a vacuum
They are all transverse waves
They can all penetrate body tissue
They all transfer energy

10. Which is the most penetrating wave in the electromagnetic spectrum?
Gamma
X rays
Visible light
Infra red

11. Which is a type of ionising radiation?
Micro waves
Visible light
Ultra violet rays
X rays

12. Which of the following is used for protection from X rays?
Several cm of lead
Thick concrete
Sheet of lead several mm thick
Metal Grids

13. Which of the following statements is not true for Gamma rays.
It can kill living cells
It is safe in low doses
It can penetrate lead several cm thick
It can be used to treat cancer

14. Which has the second longest wavelength in the electromagnetic spectrum?
Microwaves
Gamma rays
Radio waves
X rays

15. What type of radiation is visible to bees?
Ultra violet
Infra red
Gamma
X rays

16. What were ‘X rays’ initially called
Fracture Rays
X rays
High frequency rays
Unknown Rays