Which of the following statements is incorrec | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The ionosphere is a region of the Earth's upper atmosphere that is ionized by solar and cosmic radiation. This ionization process creates a plasma

Vedclass · Accepted Answer

Ionization of gases in the ionosphere is caused by radio waves.

Vedclass · Answer

(D) The ionosphere is a region of the Earth's upper atmosphere that is ionized by solar and cosmic radiation. This ionization process creates a plasma consisting of free electrons and positive ions. Because of the presence of these free electrons,the ionosphere reflects radio waves back to the Earth,acting like a $Mirror$. However,the ionization itself is caused by high-energy radiation (ultraviolet,$X$-rays) from the Sun and cosmic sources,not by the radio waves themselves. Therefore,the statement that ionization is caused by radio waves is incorrect.

Which of the following statements is incorrect?

Similar Questions

If ${\mu_r}$ is the relative permeability and $K$ is the dielectric constant of a medium,its refractive index $n$ is given by:

Assertion $(A)$: Electromagnetic waves exert pressure,called radiation pressure.
Reason $(R)$: This is because they carry energy.

Radio waves and visible light in vacuum have

The electric field of an electromagnetic wave travelling through a medium is given by $\overline{E}(x,t) = 25 \sin(2.0 \times 10^{15}t - 10^{7}x)\hat{n}$. The refractive index of the medium is . . . . . . . (All given measurements are in $SI$ units)

Atmospheric conditions affect ......... space waves.

Vedclass Test Series

Exam Paper Generator

Online Exam Module