Calculate the width of central maxima, i...

Calculate the width of central maxima, if light of 9000Å incidents upon a slit of width 1.5 mm. Screen is kept 150 cm away from the slit.

1.8 mm

1.30 mm

0.9 mm

0.9 cm

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The correct Answer is:

Width of central maxima
`=(2Dlambda)/d=(2xx1.5xx9xx10^(-7))/(1.5xx10^(-3)) =18xx10^(-4) m=1.8 mm`

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