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प्रश्न
A stick partly immersed in water appears to be bent. Draw a ray diagram to show the bending of the stick when placed in water and viewed obliquely from above.
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उत्तर
संबंधित प्रश्न
Define 1 dioptre of power of a lens.
Give the usual name for the following:
A point inside a lens through which the light passes undeviated.
A diverging lens has focal length of 3 cm. Calculate the power.
A double convex lens has focal length 25 cm. The radius of curvature of one of the surfaces is double of the other. Find the radii, if the refractive index of the material of the lens is 1.5.
Focal length : metre : : power of lens : _______
According to Rayleigh’s scattering law, the amount of scattering of light is inversely proportional to the fourth power of its ______.
The power of lens depends on the focal length of the lens
Define power of a lens. What is its unit? One student uses a lens of focal length 50 cm and another of –50 cm. What is the nature of the lens and its power used by each of them?
An object is placed in front of a converging lens. Obtain the conditions under which the magnification produced by the lens is
- negative and
- positive.
The focal length of a double convex lens is equal to the radius of curvature of either surface. What is the refractive index of its material?
