Question

Which of the following has maximum penetrating power?
(a) Ultraviolet radiation
(b) Microwaves
(c) γ-rays
(d) Radio waves

Answer 1

Explanation:

Radio waves has maximum penetrating power .

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Answer 2

(c) γ-rays have maximum penetration power.

EM waves commonly known as electromagnetic waves arise due to the vibration between electric and magnetic fields. There are several types of EM waves that can be produced from different sources.

Some EM waves and their properties:

• Ultraviolet radiation: These EM waves are produced when a body is heated at appreciably high temperatures. The wavelength of UV light ranges from 10nm - 400nm.
• Microwaves: These are produced by a tube called a magnetron. The Microwave oven used for cooking food produce microwaves that heat up water molecules thereby cooking the food. The wavelength of microwaves ranges from 1mm - 1m.
• γ-rays: These waves arise from radioactive decay. Due to high penetration power, they can damage human organs. The wavelength of γ-rays ranges from < 0.01 nm.
• Radiowaves: These are produced by charged particles by accelerating them. Artificially, transmitters are used for the production of radiowaves. The wavelength of radiowaves ranges from ≥ 1 m.