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A ray of light of intensity I is inciden...

A ray of light of intensity I is incident on a parallel glass-slab at the point A and it undergoes partial reflection and refraction as shown in the figure. At each reflection 25% of the incident energy is reflected and the rest is transmitted. If the rays AB and A'B' undergo interference, then the ratio `(I_("max"))/(I_("min"))` is

A

`4:1`

B

`8:1`

C

`7:1`

D

`49:1`

Text Solution

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The correct Answer is:
D
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Knowledge Check

  • Unpolarized light is incident on a plane glass surface. The angle of incidence so that reflected and refracted rays and perpendicular to each other, then

    A
    `"tan"i_(beta)=(mu)/(2)`
    B
    `"tan"i_(beta)=mu`
    C
    `"sin"i_(beta)=mu`
    D
    `"cos"i_(beta)=mu`

  • A ray of light in incident on a glass plate at an angle of 60^@ . What is the refractive index of glass if the reflected and refracted rays are perpendicular to each other?

    A
    `(1)/(2)`
    B
    `sqrt((3)/(2))`
    C
    `(3)/(2)`
    D
    `sqrt(3)`

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