Two coherent monochromatic light beams of intensities 4/ and 9/ are superimosed the maxmum and minimum possible intenties in the resulting beam are
A
3I and 2I
B
9I and 5I
C
16I and 3I
D
25I and I
Text Solution
Verified by Experts
The correct Answer is:
a
Here `I_(1)=4I` and `I_(2)=9I` `=4I+9I+2sqrt(4Ixx9I)` `=13I+2xx6I=13I+12I rarr I_(max)=25I` and `I_(min)=I_(1)+I_(2)-2sqrt(1_(1(I_(2)))-2sqrt(I_(1)I_(2)=4I+9)-2sqrt(4Ixx9I)` `=13I-2xx6I=13I-12I rarr I_(min)=I`
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