Why He-Ne gas Laser is superior than Ruby Laser?

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Mr Akhand Dutta is the Founder and Owner of Civil Engineering With Akhand Dutta (CEWA) and Akhand Dutta Writes. Currently, a civil engineering student at Bipin Tripathi Kumaon Institute of Technology, Dwarahat, Almora, Uttarakhand and has done his …

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Why He-Ne gas Laser is superior than Ruby Laser?

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Calculate the probability of an electron occupying an energy level 0.02 eV above the Fermi level at 200 K and 400 K in a material.

Ramesh buys a house for ₹ 2,00,000. The annual repair cost comes to 6.0% of the price of purchase. Besides, he has to pay an annual tax of ₹ 12,000. At what monthly rent must he rent out the house to get a return of 20 % on his investment (in ₹) of the first year?

Find the temperature at which there is 1.0 % probability that a state with energy 0.5 eV above Fermi energy will be occupied.

A point P is 50 mm away from both the reference planes. Draw its all possible projections.

Q.Explain the formation of Newton's rings with a ray diagram and derive the expression for determination of wavelength of light using Newton's ring experiment.