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A monochromatic beam of light falls on Y...

A monochromatic beam of light falls on YDSE apparatus at some angle `(theta)` as shown, a thin sheet of glas (R.I. = `mu`, thickness = t) is insdted in front of the lower slit `S_(2)`. Select the correct alternative.

A

Central maxima will be at O always

B

If `(mu-1) t = d sin theta ` , central maxima will be at O

C

If `(mu-1) t gt d sin theta ` central maxima will be below O

D

If `(mu-1)t = d sin theta +lambda` , a maxima is formed at O

Text Solution

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The correct Answer is:
B, C, D
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