Interactions of Electromagnetic Waves and Atoms: Gamma Rays and Radiation Dose

The video discusses how electromagnetic waves interact with electrons in atoms, causing changes in energy levels. It explains that gamma rays, a type of high-frequency electromagnetic wave, originate from changes in the nucleus of an atom. The video also covers the potential dangers of ionizing radiation, such as gamma rays, ultraviolet rays, and X-rays, and emphasizes the importance of monitoring radiation exposure to prevent tissue damage.

What happens when an electron in an atom absorbs energy from an electromagnetic wave?

• It releases an alpha particle.

• It becomes a neutron.

• It jumps to a higher energy level.

• It emits a gamma ray.

Gamma rays are emitted from the nucleus of an atom when:

• Electrons jump to higher energy levels.

• The atom absorbs ultraviolet light.

• The nucleus gains energy.

• The nucleus loses energy to become stable.

Which of the following is NOT a way for a nucleus to lose energy?

• Absorbing a beta particle

• Rearranging protons and neutrons

• Emitting a gamma ray

• Emitting an alpha particle

Why is it important to monitor radiation exposure from gamma rays?

• They are harmless to human tissue.

• They can ionize atoms in living tissue, causing damage.

• They can cause atoms to become stable.

• They increase the energy levels of electrons.

What is the maximum recommended radiation dose for a person per year?

• 20 millisieverts

• 200 millisieverts

• 2 sieverts

• 20 sieverts