Two coherant narrow slits emitting light of wavelength lambda in the same phase are placed parallel to each other at a small separation of 2lambda.The light is collected on a screen S which is placed at a distance D( gt gt A) from the slit S_(1) as shown in figure .Find teh finitedistance x suchthat the intensity of P is equal to intensity at O .

Two coherant narrow slits emitting light of wavelength lambda in the s

1.	Two coherant narrow slits emitting light of wavelength lambda in the same phase are placed parallel to each other at a small separation of 2lambda.The light is collected on a screen S which is placed at a distance D( gt gt A) from the slit S_(1) as shown in figure .Find teh finitedistance x suchthat the intensity of P is equal to intensity at O .
Answer» `D/(SQRT(3))` `sqrt(3)D` `(sqrt(3))/2` D `D/2 ` ANSWER :B

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