HARD
Earn 100

What is optical instrument resolution?

Important Questions on Wave Optics

MEDIUM
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments
The human eye works like a convex lens with an aperture of 5 mm. Two bright spots of lightλ=5000 A0 are 1 mm apart. The maximum distance from the eye at which the two spots may appear well resolved is approximately
EASY
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments
Two poles are separated by a distance of 3.14 m The resolving power of human eye is 1minute of an arc. The maximum distance from which he can identify the two poles distinctly is
HARD
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments
An LED display consists of 100 pixels per cm2. Consider that the diameter of the pupil of the eye is 5 mm and the average wavelength of the display is 575 nm. What is the nearest distance from the display one can be at, such that the display does not appear pixelated?
EASY
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments
For what distance is ray optics a good approximation when the aperture is 4 mm wide and the wavelength is 500 nm ?
EASY
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments
For what distance the ray optics will be a good approximation when the aperture is 5 mm wide and the wavelength is 450 nm?
EASY
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments
What is meant by fresnel distance?
MEDIUM
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments
Light of wavelength 5×10-7 m is diffracted by an aperture of width 2×10-3 m. For what distance in meter travelled by the diffracted beam does the spreading due to diffraction become greater than the width of the aperture?
MEDIUM
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments
For what distance is ray optics a good approximation when the aperture is 6 mm wide and the wavelength is 600 nm ?
MEDIUM
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments
What is the validity of ray optics ?
EASY
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments
For what distance ray optics is a good approximation when the aperture is 4 mm and the wavelength of light is 400 nm?
EASY
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments
With the help of a telescope that has an objective of diameter 200 cm, it is proved that light of wavelengths of the order of 6400 Å coming from a star be easily resolved. Then the limit of resolution is
EASY
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments

Two point white dots are 1 mm apart on a black paper. They are viewed by eye of pupil diameter 3 mm. Approximately, what is the maximum distance at which these dots can be resolved by the eye :-

(Take wavelength of light =500 nm )

HARD
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments
A screen is at a distance of 1 m away from the aperture. If the light of wavelength 500 nm falls on an aperture, then calculate the area of the first HPZ and radius of third HPZ
MEDIUM
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments
Find the distance up to which light of wavelength 600 nm can travel such that its spread is less than the size of an 2 mm aperture upon which it is incident.
EASY
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments
Ray optics is valid when the size of the obstacle is
HARD
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments
A screen is at a distance of 1 m away from the aperture. If light of wavelength 500 nm falls on an aperture, then calculate area of first HPZ and radius of third HPZ
EASY
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments
Ray optics is valid, when characteristic dimensions of body are
HARD
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments
What is Fresnel's distance? Obtain equation for Fresnel's distance.
EASY
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments
In Fresnel's class of diffraction, the:
EASY
Physics>Optics>Wave Optics>Resolving Power of Optical Instruments
The human eye has an approximate angular resolution of ϕ=5.8×10-4 rad and a typical photo printer prints a minimum of 300 dpi (dots per inch, 1 inch =2.54 cm). At what minimal distance z should a printed page be held so that one does not see the individual dots.