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Explain: The refractive index of diamond is much greater than that of ordinary glass. Is this fact of some use to a diamond

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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You are given prisms made of crown glass and flint glass with a wide variety of angles. Suggest a combination of prisms which will deviate a pencil of white light without much

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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You are given prisms made of crown glass and flint glass with a wide variety of angles. Suggest a combination of prisms which will disperse (and displace) a pencil of white light without much

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A man with normal near point (25 cm) reads a book with small print using a magnifying glass: a thin convex lens of focal length 5 cm. What is the closest and the farthest distance at which he should keep the lens from the page so that he can

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A man with normal near point (25 cm) reads a book with small print using a magnifying glass: a thin convex lens of focal length 5 cm. What is the maximum and the minimum angular magnification (magnifying power) possible using the above simple

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Explain: The angle subtended at the eye by an object is equal to the angle subtended at the eye by the virtual image produced by a magnifying glass. In what sense then does a magnifying glass provide angular

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Explain: In viewing through a magnifying glass, one usually positions one’s eyes very close to the lens. Does angular magnification change if the eye is moved

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Explain: Magnifying power of a simple microscope is inversely proportional to the focal length of the lens. What then stops us from using a convex lens of smaller and smaller focal length and achieving greater and greater magnifying

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Explain: Why must both the objective and the eyepiece of a compound microscope have short focal

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Explain: When viewing through a compound microscope, our eyes should be positioned not on the eyepiece but a short distance away from it for best viewing. Why? How much should be that short distance between the eye and

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Why does bluish colour predominate in a clear

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A concave lens of refractive index 1.5 is immersed in a medium of refractive index 1.65. What is the nature of the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A biconvex lens made of a transparent material of refractive index 1.25 is immersed in a water of refractive index 1.33. Will the lens behave as a- converging or a diverging lens? Give

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A biconvex lens made of a transparent material of refractive index 1.5 is immersed in a water of refractive index 1.33. Will the lens behave as a converging or a diverging lens? Give

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A convex lens is placed in contact with a plane mirror. A point object at a distance of 20 cm on the axis of this combination has its image coinciding with itself. What is the focal length of the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Write the relationship between angle of incidence i, angle of prism A and angle of minimum deviations from a triangular

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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How does focal length of a lens change when red light incident on it is replaced by violet light? Give reason for your

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Name the physical quantity which remains same for microwaves of wavelength 1 mm and UV-radiation of `1600 A^0` in

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Under what condition, does a biconvex lens of glass having a certain refractive index act as a plane glass sheet when immersed in a

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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For the same value of angle of y incidence, the angles of refraction in three media A, B and C are 15°, 25° and 35° respectively. In which medium, would the velocity of light be

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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