2. Blue light ( = 475 nm) is sent through a single slit with a width of 2.1 m. What is the maximum possible number of bright fringes produced on the screen?

A diffraction grating gives a second-order maximum at as angle of 31 for violet light ( = 4.0 10² nm). If the diffraction grating is 1.0 cm in width, how many lines are on this diffraction grating?

Is it possible to ever have a situation where an object is accelerating and has a velocity of zero? Explain.

An object rests on a ramp. As the high end of the ramp is raised further, the angle of inclination increases causing the object to start moving. With the help of a free-body diagram, explain why this happens.

Why does "centripetal force" not appear on free-body diagrams?

A ball is dropped, bouncing on the floor. Would the collision between the ball and the floor be elastic or inelastic? What physical observations would lead to this conclusion?

Is it possible that the net kinetic energy for two objects be zero while the net momentum is zero? Explain.

Explain one difference and one similarity between electric force and the force of gravity.

A charge is moved from one point to another in an electric field. Explain briefly the relationship between electric potential difference and work done in moving this charge.

What determines the direction of magnetic force acting on a moving charge? When is the magnitude of the magnetic force zero?

In looking at a series of bright and dark fringes on a screen, how would one determine whether the pattern was created by a double-slit or a single-slit? Why is there this difference in patterns?

State Einstein's two postulates of the Special Theory of Relativity. Explain the contribution of the Michelson-Morley experiment to Einstein's theory.

(I know these questions are alot, I just needed very basic few sentence explaination for each. For the two word problems, if you do it step by step please write clearly so i can understand. Thankyou once again :)