Radio waves and microwaves are used in therapy to provide \"deep heating\" of ti

Question

Radio waves and microwaves are used in therapy to provide "deep heating" of tissue because the waves penetrate beneath the surface of the body and deposit energy. We define the penetration depth as the depth at which the wave intensity has decreased to 37% of its value at the surface. The penetration depth is 15 cm for 27 MHz radio waves. For radio frequencies such as this, the penetration depth is proportional to , the square root of the wavelength.

What is the wavelength of 27 MHz radio waves?

What is the wavelength of 27  radio waves?

Explanation / Answer

given that

f = 27 MHz = 27*10^6 H

wave speed = wavelength * frequency

so lambda = c / f

lambda = 3*10^8 / 27*10^6

lambda = 11 m

Related Questions

Navigate

• Browse (All)
• Browse R
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.