When two of the three variables are known the wave equation can be used to determine what

What are similarities and differences of reflection, refraction, diffraction and absorption?

What are two different ways you could find the value of a? explain these methods.

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.