Question

Q1: A camera obscura is a cube 20 cm wide. It is to be used for viewing an 1 m large object that is 10 m away. What is the optimal size of the pin hole to minimize blur? The intensity on the back viewing screen is not an issue.

Q2: Describe how a plane mirror works. Is the image you see real or virtual and why. Does the mirror image appear closer or farther than the actual object. How can you prove that?

Q3: Propose an experimental setup to measure index of refraction of a given maleable substance.

Answer 1