Uses and Applications of Electromagnetic Waves

Which type of electromagnetic wave has the shortest wavelength and highest frequency?

• Visible light

• Infrared radiation

• Gamma rays

• Radio waves

What is a common use of radio waves?

• Cooking food

• Medical imaging

• TV broadcasting

• Sterilizing equipment

How do microwaves heat food in a microwave oven?

• By using ultraviolet radiation

• By reflecting off the food

• By transferring energy to water molecules

• By emitting visible light

What is one application of infrared radiation?

• Illuminating streets

• Heating food in toasters

• Detecting forged banknotes

• Medical imaging

Which part of the electromagnetic spectrum is used for human vision?

• X-rays

• Ultraviolet light

• Infrared radiation

• Visible light

What is a use of ultraviolet light in security?

• Detecting intruders

• Viewing inside objects

• Detecting fake banknotes

• Cooking food

How are gamma rays used in the medical field?

• For sterilizing water

• For broadcasting TV signals

• For cooking food

• For treating cancer