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

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"Meet Mr. Akhand Dutta, the visionary Founder and Owner of CEWA (Civil Engineering With Akhand Dutta). Currently, The Placement Coordinator for Structural Engineering at the prestigious National Institute of Technology, Kurukshetra. With a lif…

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

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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.

The refractive indices of core and cladding materials of a step index fibre are 1.48 and 1.45, respectively. Calculate: (i) numerical aperture, (ii) acceptance angle, and (iii) the critical angle at the core-cladding interface and (iv) fractional refractive indices change.

Elongation of a Conical Bar due to it's Self-Weight | QnA | Strength of Material | Solid Mechanics | By Akhand Dutta

The critical field for niobium is 1 × 105 A/m at 8 K and 2 × 105 A/m at 0 K. Calculate the transition temperature of the element.