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The dispersive power of crown and flint...

The dispersive power of crown and flint glasses are 0.03 and 0.05 respectively. The refractive indices ofr yellow light for these glasses are 1.517 and 1.621 respectively .it is desired to form an achromatic combination of prism of crown and flint glasses which can produce a deviation of `1^(@)` in thev yellow ray. Select right statement from the following

A

refracting angle of crown glass is `4.8^@` and that of flint glassis 2.4^@`.

B

refracting angle of crown glass is `2.4^@` and that of flint glass is `4.8^@`.

C

refracting angle of both the glasses is `4.8^@` each.

D

refracting angle of both the glasses is`2.4^@` each.

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The dispersive powers of crown and flint glasses are 0.03 and 0.05 respectively. The refractive indices for yellow light for these glasses are 1.517 and 1.621 respectively. It is desired to form an achromatic combination of prism of crown and flint glasses which can produce a deviation of 1^@ in the yellow ray. Find the refracting angles of the two prisms needed.

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In the visible region the dispersive powers and the mean angular deviations for crown and flint glass prisms are omega, omega' and d, d' respectively. The condition for getting deviation without dispersion when the two prisms are combined is

The refractive index of a glass is 1.520 for red light and 1.525 for blue light. Let D_1 and D_2 be angles of minimum deviation for red and blue light respectively in a prism of this glass. Then,

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To produce deviation without dispersion with the help of crown glass prism of refracting angle (A) and flint glass (A') they must be related as

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TARGET PUBLICATION-OPTICS-EXERCISE
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  2. A crown glass prism ofg refrecting 6^(@) is to be achromatised for red...

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  3. The dispersive power of crown and flint glasses are 0.03 and 0.05 res...

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  4. Between the primary and secondary rainbows, there is a dark band know...

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  5. Assertion : A single lens produces a coloured image of an object illum...

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  6. Assertion: A thin lens suffers from greater chromatic aberration. Re...

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  7. To reduce chromatic aberrtion.

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  8. Unit of longitudinal chromatic aberration of a thin lens is .

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  9. Focal length of convex lens made up of flint glass is 12 cm. It is pla...

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  10. After cataract operation, a peisun is recommended with concavo-convex ...

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  11. Refractive index of a flint glass varier from 1.60 to 1.66 for visible...

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  12. What causes chromatic aberration?

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  16. When we view object of height 15 m with a telescop of magnifying power...

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  18. The objectiveof a telescope A has diameter 3 times thatof the objectiv...

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