Quiz on Electromagnetic Spectrum

What is the order of the electromagnetic spectrum from longest to shortest wavelength?

• Infrared, Visible, Ultraviolet, X-rays, Gamma rays, Radio waves, Microwaves

• Ultraviolet, Visible, Infrared, Microwaves, Radio waves, X-rays, Gamma rays

• Radio waves, Microwaves, Infrared, Visible, Ultraviolet, X-rays, Gamma rays

• Gamma rays, X-rays, Ultraviolet, Visible, Infrared, Microwaves, Radio waves

Which type of electromagnetic wave is used for satellite television?

• Infrared

• Microwaves

• X-rays

• Gamma rays

What is a common use of ultraviolet light?

• Medical scanning

• Sterilising water

• Photography

• Radio transmissions

What type of signal can only take one of two states?

• Variable

• Continuous

• Digital

• Analogue

What is the speed of electromagnetic waves in a vacuum?

• 3.0 × 10^8 m/s

• 3.0 × 10^2 m/s

• 3.0 × 10^6 m/s

• 3.0 × 10^4 m/s

Which electromagnetic wave is known for causing skin burns?

• Gamma rays

• Infrared

• Radio waves

• Microwaves

What is the main danger associated with excessive exposure to X-rays?

• Mutation or damage to cells

• Internal heating

• Skin burns

• No known danger

Which type of satellite is used for global communication?

• Weather satellites

• Polar satellites

• Geostationary satellites

• Low-orbit satellites

What is the primary use of infrared radiation?

• Vision

• Security marking

• Thermal imaging

• Medical scanning

What is a benefit of digital signals over analogue signals?

• They can be regenerated for minimal noise

• They can take any value

• They require more bandwidth

• They are easier to transmit