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In a Fresnel biprism experiment, the two positions of lens give separation between the slits as 16 cm and 9 cm respectively. What is the actual distance of separation? (a) 12.5 cm (b) 12 cm (c) 13 cm (d) 14 cm



In a Fresnel biprism experiment, the two positions of lens give separation between the slits as 16 cm and 9 cm respectively. What is the actual distance of separation?


        (a)    12.5 cm


        (b)    12 cm


        (c)    13 cm


        (d)    14 cm


Grade:10

1 Answers

Navjyot Kalra
askIITians Faculty 654 Points
7 years ago

(b)
Separation between slits are (r1=) 16 cm and (r2=) 9 cm.
Actual distance of separation
√(r_1 r_2 )=  √(16×9)  = 12 cm

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