Question

Which of the following wave will show maximum diffraction?
1. Infrared waves
2. Ultraviolet waves
3. Microwaves
4. Gamma rays

Answer 1

Correct Answer - Option 3 : Microwaves

CONCEPT:

Diffraction​​:

• ​​​It is defined as the bending of waves around the corners of an obstacle​.
• The condition of diffraction is that the width of the obstacle must be less than or comparable with the wavelength of the wave.
• Diffraction is the characteristic of all types of waves.
• The greater the wavelength of the wave higher will be its degree of diffraction.
• The condition of diffraction is that the width of the obstacle must be less than or comparable with the wavelength of the wave.

EXPLANATION:

Type of Radiation	Wavelength Range
Gamma-rays	< 10-12 m
Ultraviolet	400 nm – 1 nm
Infrared	25 μm – 2.5 μm
Microwaves	1 mm – 25 μm

• Diffraction is the characteristic of all types of waves. i.e., the greater the wavelength of the wave higher will be its degree of diffraction.
• Since the wavelength of the microwaves is maximum, so the microwaves will show maximum diffraction.
• Hence, option 3 is correct.