If we have two coherent sources 'S1 and S2' vibrating in phase, then for an arbitrary point P constructive interference is observed whenever the path difference is integral multiple of wavelength.
72) If we have two coherent sources 'S1 and S2' vibrating in phase, then for an arbitrary point P constructive interference is observed whenever the path difference is
Answer is:
An integral multiple of wavelength
Explanation:
Related Optics MCQ with Answers
Answer is:
comparable to the wavelength???of the signal (at least??4)
Explanation:
To radiate signals with high efficiency, the antennas should have a size comparable to the wavelength???of the signal (at least??4)
Answer is:
attenuates the radiated signal as a result of energy absorption by it
Explanation:
Ground Wave propagation?is a method of radio frequency?propagation?that uses the area between the surface of the earth and the ionosphere for transmission. Theground wave?can?propagate?a considerable distance over the earth's surface particularly in the low frequency and medium frequency portion of the radio spectrum.
Answer is:
VLF few MHz
Explanation:
Ground Wave propagation?is a method of radio frequency?propagation?that uses the area between the surface of the earth and the ionosphere for transmission. Theground wave?can?propagate?a considerable distance over the earth's surface particularly in the low frequency and medium frequency portion of the radio spectrum.
Answer is:
120?
Explanation:
use ? = ?D/d