By definition, the wavelength of an electromagnetic wave is calculated using the following formula:
Where:
\lambda = wavelength
c = speed of light =
f = frequency of the wave.
This relation means that the division of the wavelength λ between the frequency f is always equal to the speed of light.
Thus:
the velocity v of this wave must be equal to c.
Finally the correct answer is D.
Generally, a material in solid form is more dense than in liquid form. However, an exception to this rule is water, where the solid is less dense than the liquid (hence ice floats in water)
Answer:
Explanation:
Given that
Charge on ring 1 is q1 and radius is R.
Charge on ring 2 is q2 and radius is R.
Distance ,d= 3 R
So the total electric field at point P is given as follows
Given that distance from ring 1 is R