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Optics

Resolving Power of Telescope

July 12, 2018 by Dr. IM Leave a Comment

Resolving Power of Telescope

Explain Rayleigh criterion of resolving power of optical instrument. What is resolving power? Find the resolving power of telescope. Answer: Resolving Power of Optical Instruments “The resolving power of an instrument is a measure of how well it can distinguish between two (apparently) very close sources of light”. A quantity that characterizes the ability of optical … [Read more...] about Resolving Power of Telescope

Fraunhofer diffraction by n slit

July 12, 2018 by Dr. IM Leave a Comment

Fraunhofer diffraction by n slit

Describe the Fraunhofer’s diffraction at n-single slit. Find out the expression for resultant intensity for Fraunhofer’s diffraction at n-single slit. Answer: Fraunhofer diffraction by n slit Expand our previous discussion of diffraction from a single slit; the l is an array of N slits with each slit having width “b” (b separation between slits) i.e. center to center … [Read more...] about Fraunhofer diffraction by n slit

Fraunhofer Diffraction by Double Slit

July 12, 2018 by Dr. IM Leave a Comment

Fraunhofer Diffraction by Double Slit

Describe Fraunhofer diffraction due to double slit with necessary theory and discuss the intensity distribution. What are the conditions of missing orders? Describe the features of a double slit Fraunhofer’s diffraction pattern. What is missing order? Answer: Fraunhofer Diffraction by Double Slit In the double-slit diffraction experiment, the two slits are illuminated by a … [Read more...] about Fraunhofer Diffraction by Double Slit

Fraunhofer Diffraction by Single Slit

July 12, 2018 by Dr. IM Leave a Comment

Fraunhofer Diffraction by Single Slit

Derive an expression for intensity distribution due to Fraunhofer diffraction at a single slit. Answer: Fraunhofer Diffraction by Single Slit There are some assumptions that must be made for this description of the single slit diffraction pattern: The slit size is small, relative to the wavelength of light; The screen is very far.; Cylindrical waves can be represented … [Read more...] about Fraunhofer Diffraction by Single Slit

Diffraction | Types of Diffraction

July 12, 2018 by Dr. IM Leave a Comment

Diffraction | Types of Diffraction

What is Diffraction? What is the Difference between diffraction and interference? What are the types of Diffraction? Answer: Diffraction In the year 1660 Italian scientist Francesco Maria Grimaldi observed a diffraction patterns. In classical physics, the diffraction phenomenon is described as the apparent bending of waves around slight obstacles and the spreading out of … [Read more...] about Diffraction | Types of Diffraction

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