CBSE Class 12-science Answered
define resolving power of compound microscope .how does the resolving power of a compound change when-a refractive index of medium between the object and objective lens increases b wavelength of the light used is increased c decreasing the diameter of objective d increasing the focal length of its objective
Asked by mahamood.iphone | 21 Dec, 2015, 10:34: AM
Expert Answer
The resolving power of a compound microscope can be defined as the ability of the microscope to form separate images of two objects placed very close to each other.
The minimum separation between two objects that are to be resolved by a microscope is given as
Now, the resolving power of microscope is the reciprocal of the minimum distance.
Therefore, we have
Therefore, from the above expression we can see that
(a) When refractive index of medium increases.
As the R.P is directly proportional to the refractive index (n), it increases when n increases.
(b) When wavelength of light used increases.
As the R.P is inversely proportional to the wavelength (λ), it decreases when λ increases.
(c) When diameter of objective lens increases.
When diameter of objective is increased, θ increases. Hence, sinθ also increases.
As the R.P is directly proportional to the sinθ, it increases when diameter of objective increases.
(d) When focal length of objective lens increases.
As the R.P is independent of focal length of the lens, it remains unchanged when focal length increases.
Answered by Romal Bhansali | 21 Dec, 2015, 01:57: PM
Concept Videos
-
About optical instruments
You will learn about compound microscope, astronomical telescope and magnif... -
Telescope
This video explains the concepts related to working of a telescope, which i... -
Optical instruments
Optical instruments
CBSE 12-science - Physics
Asked by tannudahiya80536 | 20 Dec, 2022, 01:13: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by kamleshstarone392 | 16 Apr, 2022, 06:26: AM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by shijurlytepz | 12 Oct, 2021, 06:56: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by khanhill543 | 31 Dec, 2020, 12:20: AM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by ABHILASHA | 15 Sep, 2020, 06:23: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by akgujrati04 | 22 Aug, 2020, 07:06: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by mazhartahsildar143 | 02 May, 2020, 01:32: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by govtsecschoolnayaganv051 | 24 Feb, 2020, 04:17: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by phenomenal1ajisback | 20 Feb, 2020, 08:08: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by singhalakash8958 | 03 Mar, 2019, 10:11: PM
ANSWERED BY EXPERT
