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How is plastic fibre material used in optical fibres? Plastic fibre: Plastic fibre is classically made of plastic. Such are low cost optical fibres. They have a huge NA and
In a young's double slit experiment the screen is 1 meter away from the slit, the separation between the slits is 1mm and the distance between the 1st and 4th fringe is 1.2mm. Find
Scanning is process of dividing an image on the screen into a large number of very small squares formed by sets of horizontal and vertical straight lines. Iconoscope i
Write down the expression for deviation produced by a thin prism also describe dispersive power.
A see-saw lever Get a thick plank about 3 m long and bring it into the class room. Balance it over a box or some other suitable device and let the pupils experiment with the se
does lights of different wavelengths help us to see different colour
Consider air (ideal gas) as working substance inside a piston-cylinder device (closed system). This air undergoes a power cycle as shown in figure. Determine work output per unit m
Rule 1: In order to sum or subtract two physical quantities the quantities must have the similar dimension. The final physical quantity has the similar dimensions. Physical quantit
Q. Two wires of same material and same length have resistances 5 and 10 respectively. Find the ratio of radii of the two wires. R = ρl / A = ρl / πr 2 R 1 = ρl / A = ρl
a pendulum is timed ,first for 20 swings and then for 50 swings ; time for 20 swings = 17.4 sec and time for 50 sec = 43.2. calculate the average time per swing/
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