Resolving Power of Optical Instruments

Resolution power of electron microscope is

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

An astronaut is looking down on earth's surface from a space shuttle at an altitude of $400 \mathrm{km}$. Assuming that the astronaut's pupil diameter is $5 \mathrm{mm}$ and the wavelength of visible light is $500 \mathrm{nm}$, the astronaut will be able to resolve linear objects of the size of about

Out of the following, resolving power of reflecting telescope depends on: 
 

An astronaut is looking down on earths' surface from a space shuttle at an altitude of $\text{400 km}$. Assuming that the astronaut's pupil diameter is $\text{5 mm}$ and the wavelength of visible light is $\text{500 nm}$, the astronaut will be able to resolve linear objects of the size of about:

Light of wavelength $600 \mathrm{n}\mathrm{m}$ is incident on an aperture of size $2 \mathrm{m}\mathrm{m}$. The distance upto which light can travel such that its spread is less than the size of the aperture is

The diameter of the pupil of human eye is about $2 \mathrm{m}\mathrm{m}$. Human eye is most sensitive to the wavelength of $555 \mathrm{n}\mathrm{m}$. The limit of resolution of human eye is

An astronomical refracting telescope will have large angular magnification and high angular resolution, when it has an objective lens of

The head lights of a jeep are 1.2 m apart. If the pupil of the eye of an observer has a diameter of 2mm and light of wavelength $5896 \AA$ is used, what should be the maximum distance of the jeep from the observer if the two head lights are just separated?

Resolution power is the ability to 

Ray optics is valid, when characteristic dimensions are