If the red light is replaced by blue light illuminating the object in a microscope the resolving power of the microscope

Options

A. M.P. increases
B. M.P. decreases
C. M.P. does not change
D. May increase or decrease depending upon the intensity of incident light

Answer

A

Explanation

For a simple microscope,
`M.P.=1+(D)/(f) or (D)/(f) I .e. M.P. prop (1)/(f)`
and for a lens, `(1)/(f)=K(n-1) or f prop (1)/((n-1))`
or `f prop (1)/(n)`
But `n_(B) gt n_(R ) therefore f_(R ) gt f_(B)`
`because M.P. prop (1)/(f)`
`therefore` (M.P.) due to blue colour gt M.P. due to red colour