SaraNextGen Study App [2022-23]
Last Updated On 23-10-2022 - By Sara

An electromagnetic wave of intensity 50 Wm−2 enters in a medium of refractive index ‘n’ without any loss. The ratio of the magnitudes of electric fields, and the ratio of the magnitudes of the wave before and after entering into the medium are respectively, given by:

(a)

(b)

(c)

(d)


Question ID - 50292 :-

An electromagnetic wave of intensity 50 Wm−2 enters in a medium of refractive index ‘n’ without any loss. The ratio of the magnitudes of electric fields, and the ratio of the magnitudes of the wave before and after entering into the medium are respectively, given by:

(a)

(b)

(c)

(d)

1 Answer
5876 Votes
3537

Answer Key : (b) -

C=

V=[for transparent medium 0]

=intensity=

C = kE2V

Similarly



Next Question :

An amplitude modulated signal is given by V(t)=10[1+0.3cos(2.2×104)]sin(5.5×105t). Here t is in seconds. The sideband frequencies (in kHz) are, [Given

(a)

1785and 1715

(b)

892.5 and 857.5

(c)

89.25 and 85.75                                                     

(d)

178.5 and 171.5


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