Describe as fully as possible the conditions needed for the bulb to light. Explain why the bulb fails to light in the arrangements drawn in answer to Question 1-2

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

A2.0 μf capacitor and a 4.0 μf capacitor are connected in series across a 0.827-kv potential. the charged capacitors are then disconnected from the source and connected to each other with terminals of like sign together. find the voltage across each capacitor.

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these