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प्रश्न
What is Rayleigh’s criterion?
उत्तर
The images of two-point objects are just resolved when the central maximum of the diffraction pattern of one falls over the first minimum of the diffraction pattern of the other.
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संबंधित प्रश्न
Two coherent monochromatic light beams of intensities I and 4I are superposed. The maximum and minimum possible intensities in the resulting beam are ______.
First diffraction minimum due to a single slit of width 1.0 × 10-5 cm is at 30°. Then wavelength of light used is ______.
What is diffraction?
Differentiate between Fresnel and Fraunhofer diffraction.
Mention the differences between interference and diffraction.
Discuss the special cases on first minimum in Fraunhofer diffraction.
What is Fresnel’s distance? Obtain the equation for Fresnel’s distance.
What is resolution?
Discuss diffraction at single slit and obtain the condition for nth minimum.
Discuss the experiment to determine the wavelength of monochromatic light using a diffraction grating.
Discuss the experiment to determine the wavelength of different colours using diffraction grating.
Obtain the equation for resolving power of optical instrument
Light of wavelength of 5000 Å produces diffraction pattern of the single slit of width 2.5 μm. What is the maximum order of diffraction possible?
Consider sunlight incident on a pinhole of width 103A. The image of the pinhole seen on a screen shall be ______.
- a sharp white ring.
- different from a geometrical image.
- a diffused central spot, white in colour.
- diffused coloured region around a sharp central white spot.
