The Law of reflection would still hold even off a curved surface. Since the angles are measured from the normal, which is perpendicular to the surface, curved surfaces don't matter. This is basis of curved mirrors such as concave and convex
Diffusion<span> is the spread of particles through random motion from regions of high concentration to regions of lower concentration. Because </span>diffusion<span> works without barriers, when </span>smoke<span> is emitted into the air, it can easily travel to surrounding areas. hope this can help you ^_^ </span>
The radio waves are electromagnetic wave, so it travels with velocity of light i.e 
.
We can use the relation between frequency, wavelength and speed as
Here c is speed of light, 
is wavelength and f is frequency and its value is given 99.90 FM, it is actually in megahertz (i.e 99.90 MHz).
Therefore,
.
Thus, the broadcast wavelength of the given radio station is 3.003 m.
