Two gratings P and Q have slit separations dp and dQ, respectively They are used with the same light source and the same observation screen. When grating P is replaced with grating Q, it is observed that the first-order maximum of P is exactly replaced by the second-order maximum of Q. Determine the ratio dQ/dp. OA. The ratio is equal to 2 OB. The ratio is equal to 4 OC. The ratio is equal to 5 OD. The ratio is equal to 1 OE. The ratio is equal to 3

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QUESTION 5
Two gratings P and Q have slit separations dp and dQ, respectively They are used with the same light
source and the same observation screen When grating P is replaced with grating Q, it is observed
that the first-order maximum of P is exactly replaced by the second-order maximum of Q. Determine
the ratio do/dp.
OA. The ratio is equal to 2
B. The ratio is equal to 4
OC The ratio is equal to 5
OD.The ratio is equal to 1
O E. The ratio is equal to 3
Transcribed Image Text:QUESTION 5 Two gratings P and Q have slit separations dp and dQ, respectively They are used with the same light source and the same observation screen When grating P is replaced with grating Q, it is observed that the first-order maximum of P is exactly replaced by the second-order maximum of Q. Determine the ratio do/dp. OA. The ratio is equal to 2 B. The ratio is equal to 4 OC The ratio is equal to 5 OD.The ratio is equal to 1 O E. The ratio is equal to 3
Expert Solution
Step 1

In this case, the light and observation scree both are same for both gratings so write the relation.

dsinθ=mλso,dm=constantdPmP=dQmQ

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