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Constant Table: e0 =8.85´10-12C2×N--1×m-2 ; R=8.315J-mol-1×K-1; m0= 4π´10-7N×A-2; h = 6.63´10-34J×s; e = 1.602´10-19C; G=6.67´10-11N×m2-kg-2; me=9.11´10-31kg;...

Constant Table:

e0 =8.85´10-12C2×N--1×m-2 ; R=8.315J-mol-1×K-1; m0= 4π´10-7N×A-2; h = 6.63´10-34J×s;

e = 1.602´10-19C; G=6.67´10-11N×m2-kg-2; me=9.11´10-31kg; g=9.8 m/s2;

(8) The intensity of a light beam doubles on passing through a particular semiconductor amplifier of device length 2.5 mm. What is the gain coefficient of the device? (   )

(A) 0.28 mm-1

(B) 2.00 mm-1

(C) 0.50 mm-1

(D) 0.12 mm-1

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