An object is placed at the Centre of curvature of a concave
mirror. The image produced by the mirror is located:
A converging mirror with a radius of 20cm creates a real
image 30 cm from the mirror. What is the object distance:
Which type of image is produced by the converging lens of
human eye if it views a distant object:
Electron gun has an electrode called for controlling the
flow of electrons in the beam: