Physics Scope 11 Part 4

What is the main difference between nonionizing and ionizing radiation?

• Nonionizing radiation can remove electrons from atoms.

• Ionizing radiation has enough energy to remove tightly bound electrons from atoms.

• Nonionizing radiation is harmful to human health.

• Ionizing radiation is absorbed by matter and transformed into thermal energy.

Which of the following is considered nonionizing radiation?

• Gamma rays

• Visible light

• X-rays

• UVC rays

What is the frequency range of microwaves?

• 750 THz to 30 PHz

• 430 THz to 790 THz

• 300 GHz to 430 THz

• 300 MHz to 300 GHz

Which type of electromagnetic wave is used in remote controls for television sets?

• Ultraviolet light

• Radio waves

• Microwaves

• Infrared light

What is the primary use of UVB light in the human body?

• To generate electricity

• To heat food

• To produce vitamin D

• To transmit radio signals

Which of the following is true about visible light?

• It is harmful to human health.

• It is ionizing for all types of matter.

• It is not visible to the human eye.

• It has a frequency range between 430 THz and 790 THz.

What is the effect of microwaves on water molecules?

• They have no effect on water molecules.

• They ionize the water molecules.

• They cause the water molecules to vibrate, leading to heating.

• They freeze the water molecules.

Which type of ultraviolet radiation is considered ionizing?

• All of the above

• UVC

• UVB

• UVA

What is the frequency range of infrared light?

• 300 MHz to 300 GHz

• 750 THz to 30 PHz

• 300 GHz to 430 THz

• 430 THz to 790 THz

Which of the following is a potential risk of microwave ovens?

• They emit ionizing radiation.

• They can cause food to become radioactive.

• Radiation leaks due to faulty door seals.

• They produce harmful gamma rays.