If 2y cos θ = x sin θ and 2x sec θ - y cosec θ = 3, then the value of x2+ 4y2 is
What is the velocity of light in a diamond if the refractive index of diamond with respect to vacuum is 2.5?
Energy that is produced commercially from coal is called –
Which of the following optical phenomena CANNOT convert unpolarised light to plane polarised light?
If the distance between two consecutive crests is L, then the wavelength is given by______.
A constant retarding force of 20 N is applied to a body of mass 10 kg moving initially with a speed of 12 m s–1. How long does the body tak...
Is Ohm’s law universally applicable for all conducting elements?
Pycnometer is an instrument used to measure the –
The surface tension of water on adding detergent to it –
In the absence of ozone layer, which rays will enter into atmosphere?