Refraction Of Light Mock Tests

A concave lens of focal length 20 cm forms an image of an object placed at a distance of 30 cm from the lens. The image is:

A ray of light passes from air into a glass slab. Which of the following changes?

A convex lens of focal length 15 cm is used as a magnifying glass. The maximum distance of the object from the lens to get a magnified image is:

Total internal reflection occurs when light travels from a denser medium to a rarer medium and the angle of incidence is:

A convex lens of focal length 10 cm forms a virtual image of an object placed 5 cm from the lens. The image distance is:

The power of a lens is +2.0 D. The focal length of the lens is:

A convex lens forms a real and inverted image of an object. If the upper half of the lens is covered with opaque paper, what will happen?

A ray of light enters from medium A (refractive index = 1.5) into medium B (refractive index = 1.33). The angle of incidence is 30°. The angle of refraction will be: