1.

Diameter of objective of a telescope is 10 cm Its distance from two different objects is 1 km If wavelength of light is 5000 Å, then at wha minimum distance, these objects are clearl seen by telescope ?

Answer»

5 cm
0.5 m
5 m
5 mm

Solution :Here ,`(X)/(1000)=(1.22lambda)/(D)`
or `x=(1.22xx5xx10^3xx10^(-10)xx10^3)/(10xx10^(-2))`
`=1.22xx5xx10^(-3)`m =6.1 mm
which is order of 5 mm for x.


Discussion

No Comment Found

Related InterviewSolutions