JEE · NEET Previous Year Question
A layer of atmosphere that reflects medium frequency radio waves which is ineffective during night is
Topic: JEE PYQ
Answer: C. Full step-by-step solution below.
- A layer
- BStratosphere
- CE layer
- DThermosphere
Correct answer: C
Solution
(c) : E-layer is at a virtual height of from the surface of earth. This layer exists during day time but disappears at night. The critical frequency of this layer is about and reflects medium frequency radio waves ( to ).More Electromagnetic Waves PYQs
- Two coherent sources of light interfere and produce fringe pattern on a screen. For central maximum, the phase difference between…
- The ratio of average electric energy density and total average energy density of electromagnetic wave is:
- The oscillating magnetic field in a plane electromagnetic wave is given by…
- The ratio of contributions made by the electric field and magnetic field components, to the intensity of an electromagnetic wave i…
- In an electromagnetic wave in free space the root mean square value of the electric field is …