Light of 6000 Å is incident on a circular hole and is received on a – McqOptions

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1.	Light of 6000 Å is incident on a circular hole and is received on a screen 50 cm away. What is the radius of the hole, if the intensity of light on the screen is 4 times the intensity without the hole?
A.	0.025 cm
B.	0.047 cm
C.	0.054 cm
D.	0.089 cm
Answer» D. 0.089 cm

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