Optics Mock Tests

A converging lens of focal length f₁ is in contact with a diverging lens of focal length f₂ where |f₂| > f₁. The combination behaves as:

A convex lens of focal length f produces a real image twice the size of the object. The object distance is:

A convex lens of focal length 10 cm is used as a simple microscope. The magnifying power when the image is formed at the least distance of distinct vision (25 cm) is:

A prism of refracting angle 60° produces minimum deviation of 30°. The refractive index of the prism material is:

A convex lens of focal length f produces a real image that is twice the size of the object. The object distance is:

A convex lens has a focal length of 20 cm. An object is placed 30 cm in front of the lens. Where is the image formed?

The power of a lens of focal length 50 cm is:

In Young's double-slit experiment, the fringe width is 0.4 mm. If the distance between the slits is doubled, the new fringe width will be: