Radiation Questions

The energy that originates from a source and travels through space at the speed of light is known as radiation. This energy has an electric field and a magnetic field associated with it and has wave-like properties.

Radiation is classified as being either non-ionizing or ionizing. Ionizing radiation refers to types of radiation that hold enough energy to cause ionization in atoms. On the other hand, non-ionizing radiation relates to types of radiation that do not have enough energy to cause ionization in atoms.

Exposure to very high radiation levels can cause skin burns. It can also result in long-term health consequences such as cancer and cardiovascular disease.

Read more: Effects of radiation

Important Radiation Questions with Answers

1. Atoms with unstable nuclei are said to be_____.

1. non-radioactive
2. radioactive
3. partially radioactive
4. none of the options

Answer: b) radioactive

Explanation: The property possessed by some elements to spontaneously emit energy in the form of radiation due to the decay of an unstable atom is called radioactive.

2. The mechanical pressure applied upon any surface, which takes place due to the interchange of momentum between the electromagnetic field and the object is known as _____.

1. Light pressure
2. Electromagnetic pressure
3. Radiation pressure
4. Momentum pressure

Answer: c) Radiation pressure.

3. How is radiation classified?

Radiation is classified into two types as:

• Ionizing radiation
• Non-ionizing radiation

4. Which waves are responsible for earthquakes and volcanic eruptions?

1. X-rays
2. Alpha rays
3. Seismic waves
4. Sound waves

Answer: c) Seismic waves.

5. Which of the following is an example of electromagnetic radiation?

1. neutron radiation
2. Alpha rays
3. Seismic waves
4. X-rays

Answer: d) X-rays

Explanation: Among the following options, X-ray is a type of electromagnetic radiation.

6. Fill in the blanks: Ultrasound is a _____

1. Electromagnetic radiation
2. Gravitational radiation
3. Acoustic Radiation
4. Particle Radiation

Answer: c) Acoustic Radiation

Explanation: Acoustic radiation is a physical phenomenon that is generated due to the interaction of an acoustic wave with an obstacle placed along its path.

7. State true or false: Light is a form of electromagnetic radiation.

1. TRUE
2. FALSE

Answer: a) TRUE

Explanation: Light is a non-mechanical wave and is a form of electromagnetic radiation. Since light does not require a material as a medium to propagate, it can travel through space.

8. Strontium-90 is used for the treatment of _____

1. Flu
2. Cold
3. Bone cancer
4. Arthritis

Answer: c) Bone cancer.

Explanation: Strontium-90 is a beta particle used to treat bone cancer.

9. Particles including two protons and two neutrons bound together are known as

1. Alpha particle
2. Beta particle
3. Gamma particle
4. X-rays

Answer: a) Alpha particle.

Explanation: Alpha particles are identical to the helium atom and are emitted during the radioactive decay process known as alpha decay.

10. Choose YES or NO: Is radiation associated with hair loss and thyroid functioning?

1. YES
2. NO

Answer: a) YES

Explanation: Radiation is associated with hair fall and thyroid functioning. When radiation is higher than 200 rems, hair loss takes place. The thyroid gland is damaged due to the presence of excess radioactive iodine.

Practice Questions

1. List the effects of radiation on the human body.
2. What is radiation?
3. What are the types of nuclear radiation?
4. What is light?
5. What are the types of UV radiation?

Watch the video below to understand the blackbody radiation.

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