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Question
The resolving power of telescope of aperture 100 cm for light of wavelength 5.5 x 10-7 m is _______________.
Options
0.149 x 107
1.49 x 107
14.9 x 107
149 x 107
Solution
The resolving power of telescope of aperture 100 cm for light of wavelength 5.5 x 10-7 m is 0.149 x 107.
Aperture(diameter) of telescope D = 100cm = 1m
Wavelength of light λ = 5.5 x 10-7 m
Resolving power of telescope RP = `D/[1.22λ]`
⇒ RP = `1/[ 1.22 xx 5.5 xx 10^-7] = 0.149 xx 10^7`
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The numerical aperture of objective of a microscope is 0.12. The limit of resolution, when light of wavelength 6000A is used to view an object is.......................
- 0.25 * 10-7m
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If 'a' is the aperture of telescope and A. is the wavelength of light then resolving power of telescope is .............
a) `lambda/(1.22a)`
b) `(1.22a)/lambda`
c) `(1.22 lambda)/a`
d) `a/(1.22lambda)`
