motion

1. What are the different types of motion?
2. Define velocity?
3. What is uniform velocity?
4. What are equations of motion?
5. What is uniform accelerated motion?
http://en.wikipedia.org/wiki/Equations_of_motion

Water waves diffraction

Water waves diffraction

Water waves diffraction

Water waves diffraction

diffraction

diffraction
for more infomation:
http://en.wikipedia.org/wiki/Diffraction

waves

interference of waves
for more information:
http://en.wikipedia.org/wiki/Interference

Answer the following

1. What is photoelectric effect?

2.Explain einstein's photoelectric equation?

2