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The least resolvable angle by a telescop...

The least resolvable angle by a telescope using objective of aperture 5 m is nearly `(lambda = 400 Å)`

A

`(1)/(50^(0))`

B

`(1)/(50)` minute

C

`(1)/(50)`sec

D

`(1)/(500) ` sec

Text Solution

Verified by Experts

The correct Answer is:
C
`theta = (1.22 lambda)/(a)`
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Knowledge Check

  • The average distance between the earth and moon is 3.86xx10^(4)km . The minimum separation between the two points on the surface of the moon that can be resolved by a telescope whose objective lens has a diameter os 5 m with lambda=6000 Å is

    A
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    B
    `28.25 m`
    C
    `11.30 m `
    D
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    A
    `2xx10^(6)`
    B
    `2.5xx10^(6)`
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    `2xx10^(5)`
    D
    `2.5xx10^(4)`

  • The resolving power of a telescope having lens of diameter 1.22 m for a wavelength of 5000 Å is

    A
    `2xx10^(5)`
    B
    `2xx10^(6)`
    C
    `2xx10^(2)`
    D
    `2xx10^(4)`

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    Assume that light of wavelength 500 nm is used to illuminate a telescope. What is the resolving power of a telescope whose objective has a radius of 200 cm ?

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