The focal length of a concave mirror is 10 cm. For an object at 15 cm, the image is:

Total internal reflection occurs when light travels from:

The power of a lens of focal length 25 cm is:

A prism of angle 60° has minimum deviation 30°. Its refractive index is:

Magnifying power of a simple microscope for near point D = 25 cm, focal length 5 cm:

Chromatic aberration in lenses is due to:

The critical angle for glass (n = 1.5) to air is:

An object is placed at the centre of curvature of a concave mirror. The image is:

Optical fibers work on the principle of:

For a thin lens, if the image distance is twice the object distance, the magnification is:

The lens maker's equation is:

A concave mirror can form:

Two thin lenses of power +5D and −3D in contact. Combined power:

Lateral shift in a glass slab depends on:

The angular magnification of an astronomical telescope in normal adjustment is:

A convex mirror always forms:

Snell's law of refraction is:

Myopia is corrected using:

The magnifying power of a compound microscope depends on:

When a ray of light enters a denser medium, it bends: