Define power of a lens. What is its unit ? One student uses a lens of focal length 50cm and another of −50cm. What is the nature of the lens and power used by each of the them ? View Solution Define time constant of an RC circuit. What is its SI unit? View Solution Define RQ...
The image produced by a convex lens depends upon what? What kind of reflection does a mirror give? What is refraction of light in lenses? Which kinds of images can be created by curved mirrors? What is the focal length of a plane mirror? What are pictures that you need a curved mirror...
A type of video camera often used in surveillance systems, named because of its shape and size. Bullet cameras are small (2 to 2.5 inches long) and are limited to a fixed focal length lens. While bullet cameras are good for small spaces, the images may have slightly cut-off corners beca...
zoom lens In digital cameras and digital video recording devices, a zoom lens let you to select any focal length within the len’s range. The lens changes the angle of view and its magnifying power based on the zooming range selected. Zooming out gives the photographer a wide-angle view ...