Light Reflectio...

The image of an object formed by a device is always virtual and diminished. The device may be

A convex lens of focal length10 cm is placed at a distance of 12 cm from a wall. How far from the lens should an object be placed so as to form its real image on the wall?

A diverging lens of 20 cm focal length forms on image 15 cm from the lens. What is the distance of the object from the lens?

The refractive index of water with respect to air is 1.33. The refractive index of air with respect to water will be

When rays of light fall on a convex lens, it

If magnification is positive, the nature of the image is:

A ray of light passes from air into water. The angle of refraction will be

The twinkling of stars is due to atmospheric

When reflection takes place from a spherical mirror, positions of the object and its image are measured from the ......................

An object is placed $$15\ cm$$ from a diverging mirror of radius of curvature $$20\ cm$$. What is the image magnification produced?