Optics Answers

In an electrolysis experimenta cathode of mass 5g found to weight 5.01g after a current of 5A flows for 50 second. What is electrochemical equivalent of the deposited substance ?

The core diameter of multimode step index fibre is 60 micrometer. The difference in refractive index is 0.013. The core refractive index is 1.46. Predict the number of guided modes when the operating wavelength is 0.75 micrometer

The resistance of a wire of length 100cm diameter 0.3mm is found to be 3.0 ohms Calculate (1) the resistivity (2) the conductivity of the material of a wire

Determine the ratio of stimulated and spontaneous emission rates. Predict the temperature at which these rates will be same for wavelength 1000 nm.

Numerical aperture of a fibre is 0.5 and core refractive index is 1.48. Find cladding refractive index and acceptance angle .

Determine the ratio of stimulated and spontaneous emission rates. Predict the temperature at which these rates will be same for wavelength 1000 nm.

The velocity of light in a liquid is 0.80 as fast as it is in air. What is the index of

refraction of the liquid?

an object of height 17.5cm is placed 17.2cm from a diverging lens. what is the angular size of the object?

Write an expression for visibility (v) of interference pattern resulting from two coherent waves assuming (i) their fields to be parallel (ii) their fields to be equal and parallel? v= (I max -I min ) (I max +I min )

1 decibel at 500 nm is 100 W, what is the number of watts at 550 nm?