A sky wave with a frequency 55 MHz is incident on D-region of earth's – McqOptions

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1.	A sky wave with a frequency 55 MHz is incident on D-region of earth's atmosphere at 45o. The angle of refraction is (electron density for D-region is 400 electron/cm3) [Haryana PMT 2003]
A.	60°
B.	45°
C.	30°
D.	15°
Answer» C. 30°

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