Quantum physics is the study of matter and energy at its most fundamental level. A central tenet of quantum physics is that energy comes in indivisible packets called quanta. Quanta behave very ...

A laser is usually constructed from two basic elements: a material that provides optical gain through stimulated emission and an optical cavity that partially traps the light. When the total gain in ...

NEW DELHI – In the small village of Alwar, Rajasthan, eighteen-year-old Afseena sat on the mud floor of her home, flipping through the worn pages of her only textbook. She had read the same lessons ...

Certain materials feel a magnetic force. A magnetic force can be either attraction or repulsion. How to make a magnetic compass Learn how to make a magnetic compass.