The objective of telescope A has a diameter 3 times that of the objective of telescope B.How much greater amount of light is gathered by A as compared to B?

In these question, a statement of asertion followed by a statement of reason is given .Choose the correct answer out of the following choices: Assertion and reason both are correct statements and reason is correct explanation for assertion. Assertion and reason both are correct statements but reason is not correct explanation for assertion. Assertion is correct statement but reason is wrong statement. Assertion is wrong statement but reason is correct statement. Assertion:The resolving power of a telescope is more ,if the diameter of the objective lens is more. Reason:Objectives lens of large diameter collects more light.

The lens of our eye has a diameter of 0.8 cm .How much fainter star can be seen through the 508 cm objective telescope at Mount Polomar in U.S.A?

The diameter of the objective lens of the telescoe is 5 m and waveelnegth of light is 6,000 overset @A .The limit of resolution of this telescope is:

A telescope has an objective of diameter of 60 cm. The focal lengths of the objective and eye piece are 2.0 m and 1.0 cm respectively. The telescope is directed to view two distant almost point sources of light (e.g. two stars of a binary). The sources are at roughly the same distance (=10^4 light years) along the line of sight but separated transverse to the line of sight by a distnace of 10^10 m . what will the telescope resolve the two objects i.e. will it see two distinct stars?

A telescope has an objective lens of 10 cm diameter and is situated at a distance of 1 km from two objects.The can be resolved by the telescope, when the mean wavelength of light is 5,000 overset @A ,is of the order of

A telescope has objective lens of focal length 15m. If this telescope is used to view the moon, what is the diameter of the image of the moon formed by the objective lens? The diameter of the moon is 3.48 xx 10^6m , and the radius of lunar orbit is 3.8 xx 10^8m .

A reflecting type telescope has a large spherical mirror for its objective with radus of curvature equal to 80 cm.What is the magnifying power of telescope,if eyepiece used has a focal length of 1.6 cm.

How does magnifying power of a telescope change on decreasing the aperture of its objective lens?Justify your answer.

A copper wire has diameter 0.5 mm and resistivity of 1.6xx10^(-8) How much dows the resistence change if the diameter is doubled?

Two radioactive nuclides A and B have half-lives 50 min and 10 min respectively . A fresh sample contains the nuclides of B to be eight times that of A. How much time should elapse so that the mumber of nuclides of A becomes double of B ? a) 30 b) 40 c) 50 d) 100