Question

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6. Let ( a ) and ( 2 a ) be the amplitudes of the two waves coming from the two slits. Then
( a_{max }=2 a+a=3 a( ) Constructive interference)
1
( a_{min }=2 a-a=a quad ) (Destructive interference)
[
therefore quad frac{I_{max }}{I_{min }}=frac{a_{max }^{2}}{a_{min }^{2}}=frac{(3 a)^{2}}{a^{2}}=9: 1
]

# 6. The width of one of the two slits in a Young's double slit experiment is double of the other slit. cor Assuming that the amplitude of the light coming rar from a slit is proportional to the slit width, find the col ratio of the maximum to the minimum intensity in pa the interference pattern. (Ans. 9:1) is di Y HINTS

Solution