If a sky wave with a frequency of 50 MHz is incident on the D-region at an angle of 30°, then the angle of refraction is:

If a sky wave with a frequency of 50 MHz is incident on the D-region a

1.	If a sky wave with a frequency of 50 MHz is incident on the D-region at an angle of 30°, then the angle of refraction is:
A.	50°
B.	60°
C.	30°
D.	5.5°
Answer» D. 5.5°

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If a sky wave with a frequency of 50 MHz is incident on the D-region at an angle of 30°, then the angle of refraction is:

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