Light or visible light is electromagnetic radiation within the portion of the electromagnetic spectrum that can be perceived by the human eye. Visible light is usually defined as having wavelengths in the range of 400–700...
Questions: 20 | Attempts: 8434 | Last updated: May 31, 2021
Light is best described as a:
Sample multiple-choice questions for light and optics unit.
Questions: 15 | Attempts: 11300 | Last updated: Jan 6, 2021
A light ray has an angle of incidence of 34º. The reflected ray will make what angle with the reflecting surface?
Questions: 15 | Attempts: 5170 | Last updated: Feb 24, 2021
A ray of light strikes a plane mirror PQ at an angle of incidence of 30o, is reflected from the plane mirror, and then strikes a second plane mirror QR placed at right angles to the first mirror. The angle of reflection at the second mirror is: