Ray Optics Test...

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

Two points separated by a distance of 0.1 mm can just be resolved in a microscope when a light of wavelength 6000 Å is used. If the light of wavelength 4800 Å isused this limit of resolution becomes

The angular magnification of a simple microscope can be increased by increasing

Wavelength of light used in an opticalinstrument are λ₁. = 4000 Å and λ₂ = 5000 Å, then ratio of their respective resolving power (corresponding to λ₁ and λ₂) is

The separation between two microscopic particles is measured P_A and P_B by two different lights of wavelength 2000 Å and 3000 Å respectively, then

Which of the following is not correct regarding the radio telescope?

A simple telescope, consisting of an objective of focal length 60 cm and a single eye lens of focal length 5 cm is focused on a distant object is such a way that parallel rays come out from the eye lens. If the object subtends an angle 2° at the objective, the angular widthof the image

A photograph of the moon was taken with telescope. Later on, it was found that a housefly was sitting on the objective lens of the telescope. In photograph

To increase the magnifying power of telescope (f₀ = focal length of the objective and f_e = focal length of the eye lens)

Relative difference of focal lengths of objective and eye lens in the microscope and telescope is given as