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The weight of a body at rest is 600 N. When the body is in the elevator it has a weight P = 780 N. Determine: a. the acceleration with which the elevator moves. b. The direction of the elevator movement and the type of elevator movement.
A coupled pendulum system is in a vertical plane . Each rod is of mass m and length l and can freely oscillate about the point of suspension. The spring is attached at a length d from the points of suspensions. Write the equation of motion for both the rods and find the frequencies of normal modes. Find out the ratios of amplitudes of the two oscillators for exciting the normal modes.
- the two rods length (l) of mass (M) each are hung . between them a spring of constant k is there at a distance of (d) from point of hung
You have an equilateral triangle, and it happens you place three charges 28C, -52C, 60C on each vertex, the equilateral triangle is separated by the distance 44fm. What is the total net force experience by q2 due to other two charges if the charge is place at the middle vertex of the triangle?
Briefly, describe the advantages of a 4-level laser system over 3-level laser system.
What is the physical significance (importance) of free spectral range (δνr) of the resonator in real laser systems?
In color center laser, what are the active medium, host material, and laser wavelength? Illustrate the factor, on which laser wavelength depends?
How to lower down the laser threshold in Nd-glass laser and what we want to achieve (purpose/get) by lowering down it?
Where ND is neodymium.
For an optical resonator, what is the physical significance of the equation, n(ν)dν = 8π(ν3/c3) dν?
where ν stands for frequency, c for velocity of light, and Nd for neodymium.
Draw the level scheme (schematic) of the He-Ne laser system. Demonstrate it, why we use He in He-Ne laser system?
Where L stand for laser, He stand for Helium and Ne stand for Neon.
If the mirror separation d = 50 cm changes by 2 nm, what would be the change in relative frequency? If the laser frequency is νL = 4 x 1014s-1, what would be the value of ∆νL=?
