With the aid of a simple diagram: (i) illustrate how interference is observed with llyod's mirror apparatus. describe expressions to locate the minima and maxima in the interference pattern.
with the aid of a suitable diagram (ii) explain how a thin film of refractive index n can be used as an anti-reflective coating on a glass lens with refractive index ng.

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the

Which is special about a dc circuit ? a. it has both series and parallel components b. it has only series or only parallel components c. charge moves in a single direction d. charge moves back and forth quickly

This is the number of complete movements of a wave per second.