What kind of waves that can survive as standing wave ?

What is wave equation ?

Assume that the de-Brogile wave associated with an electron can form a standing wave between the atoms arranged in a one dimensional array with nodes at wach of the atomic sites. If is found that one such standing wave is formed if the distance 'd' between the atoms of the array is 2Å . A similar wave in again formed if 'd' is increased to 2.5 A but not for any intermediate value of d. Find the energy of the electrons in electron volts and the least value of d for which the standing wave of the standing wave of the type described above can form.

The displacement of the medium in a sound wave is given by the equation y_(1) = A cos(ax + bt) where A , a and b are positive constants. The wave is reflected by an obstacle situated at x = 0 . The intensity of the reflected wave is 0.64 times that of the incident wave. (a) What are the wavelength and frequency of incident wave? (b) Write the equation for the reflected wave. ( c ) In the resultant wave formed after reflection, find the maximum and minimum values of the particle speeds in the medium. (d) Express the resultant wave as a superposition of a standing wave and a travelling wave. What are the positions of the antinodes of the standing wave ? What is the direction of propagation of travelling wave?

What is called a transverse wave ?

What is called a longitudinal wave ?

What is refracted wave ?

What is diffraction ? Who discovered it? What kind of diffraction phenomenon occurs in waves ?

Which of the given phenomenon is based on the fact that light waves are transverse electromagnetic waves?