Q78: The most commonly used microwave frequencies in food applications are... - Basic and General Aspects of Livestock Products - Livestock Products Technology- ICAR JRF/SRF 2024 | Agrigyan

• Approved Microwave Frequencies in Food Processing:
• Under international radio regulations governing Industrial, Scientific, and Medical (ISM) equipment, the Federal Communications Commission (FCC) and ITU allocate specific microwave frequencies for dielectric food processing:
• $2450\text{ MHz}$ ($2.45\text{ GHz}$): The universal standard frequency employed in domestic microwave ovens and commercial continuous food tempering systems.
• $915\text{ MHz}$ ($0.915\text{ GHz}$): Has greater wavelength ($32.8\text{ cm}$ vs. $12.2\text{ cm}$) and deeper penetration depth, widely utilized in large-scale industrial bulk meat thawing, tempering, and pasteurization.

Correct option: (2) 2450 and 915 megahertz