Science Questions

If the refractive index of glass is 1.5 and that of water is 1.33, what is the refractive index of glass with respect to water?

A convex lens forms a real image of a point object at a distance of 50 cm. If the object is at 50 cm, what is the power?

What is the apparent depth of a 12 cm deep tank of water (n=4/3) when viewed from above?

A glass slab of thickness 6 cm is placed over a paper. How much does the text appear to be raised (n=1.5)?

A person can see objects clearly only between 50 cm and 200 cm. What lens is required to see distant objects?

Two plane mirrors are inclined at 60 degrees. How many images of an object placed between them will be formed?

The magnifying power of a telescope is 10 and its length is 110 cm. What are the focal lengths of the lenses?

A ray of light is incident at 60 degrees on one face of an equilateral prism. If it suffers minimum deviation, the angle of refraction inside the prism is:

A concave mirror has a radius of curvature of 40 cm. To get an image twice the size of the object, the object distance should be:

A ray of light enters a glass slab at an angle 'i'. If the lateral displacement is half the thickness, and the refractive index is sqrt(3), find 'i'.

A lens of power P is cut into two equal halves along the principal axis. The power of each half is:

Light of wavelength 6000 Angstroms in air enters a medium of refractive index 1.5. What is the wavelength in the medium?

In a human eye, the 'Blind Spot' is:

If a convex lens of focal length 20 cm and a concave lens of focal length 50 cm are combined, the system behaves as a:

What is the angle of incidence when a ray of light is reflected back along its own path from a spherical mirror?

The velocity of light in two media A and B are 2x10^8 m/s and 2.5x10^8 m/s. The critical angle for light going from A to B is:

A point object is placed 10 cm from a convex lens of focal length 20 cm. The image formed is:

Dispersion in a prism is primarily caused by:

A simple microscope has a lens of focal length 5 cm. Its magnifying power for relaxed eye (image at infinity) is:

The sun is visible a few minutes before actual sunrise due to: