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

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

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

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

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

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

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

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

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

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

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

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

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

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

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