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A person has normal far point (infinity) and near point (25 cm). He intends to read a book using a magnifying glass of focal length 5 cm. What is (a) the closest and (b) the farthest distance at
08
Oct
A person has normal far point (infinity) and near point (25 cm). He intends to read a book using a magnifying glass of focal length 5 cm. What is (a) the closest and (b) the farthest distance at A person has normal far point (infinity) and near point (25 cm). He intends to read a [...]
A converging lens of focal length 6.25 cm is used as a magnifying glass. If the near point of the observer is 25 cm from the eye and the lens is held close to the eye, calculate:
08
Oct
A converging lens of focal length 6.25 cm is used as a magnifying glass. If the near point of the observer is 25 cm from the eye and the lens is held close to the eye, calculate: A converging lens of focal length 6.25 cm is used as a magnifying glass. If the near point [...]
A concave lens is made of crown glass and radii of curvatures equal to 25 cm and 30 cm. Compute the longitudinal chromatic aberration for the lens. Take refractive indices of crown
08
Oct
A concave lens is made of crown glass and radii of curvatures equal to 25 cm and 30 cm. Compute the longitudinal chromatic aberration for the lens. Take refractive indices of crown A concave lens is made of crown glass and radii of curvatures equal to 25 cm and 30 cm. Compute the longitudinal chromatic [...]
The dispersive power of the material of a lens is 0.026 and it produces a chromatic aberration of 0.351 cm. Calculate its focal length for mean colour.
08
Oct
The dispersive power of the material of a lens is 0.026 and it produces a chromatic aberration of 0.351 cm. Calculate its focal length for mean colour. The dispersive power of the material of a lens is 0.026 and it produces a chromatic aberration of 0.351 cm. Calculate its focal length for mean colour. October [...]
A point object has velocity v0 = 5 m/s when it is placed at a distance of 20 cm from a lens moving with a speed v lens = 2 cm/s towards left. If the focal length of the lens is
08
Oct
A point object has velocity v0 = 5 m/s when it is placed at a distance of 20 cm from a lens moving with a speed v lens = 2 cm/s towards left. If the focal length of the lens is A point object has velocity v0 = 5 m/s when it is placed at [...]
On a horizontal plane mirror, a thin equiconvex lens of glass is placed and when the space between the lens and mirror is filled with a liquid, an object held at a distance D which is 30 cm vertically above the lens is found to
08
Oct
On a horizontal plane mirror, a thin equiconvex lens of glass is placed and when the space between the lens and mirror is filled with a liquid, an object held at a distance D which is 30 cm vertically above the lens is found to a thin equiconvex lens of glass is placed and when [...]
The convex side of a thin concavo-convex lens of glass of refractive index 1.5 has a radius of curvature of 20 cm. The concave surface has a radius of curvature of 60 cm. What is the focal length
08
Oct
The convex side of a thin concavo-convex lens of glass of refractive index 1.5 has a radius of curvature of 20 cm. The concave surface has a radius of curvature of 60 cm. What is the focal length The convex side of a thin concavo-convex lens of glass of refractive index 1.5 has a radius [...]
A uniform rod AB, 12 m long weighing 24 kg, is supported at end B by a flexible light string and a lead weight (of very small size) of 12kg attached at end A. The rod floats in water with one-half of its length submerged. For this situation, mark out the correct statement. [Take g = 10 m/s ^2 , density of water =1000 kg/m ^ 3 ]
08
Oct
A uniform rod AB, 12 m long weighing 24 kg, is supported at end B by a flexible light string and a lead weight (of very small size) of 12kg attached at end A. The rod floats in water with one-half of its length submerged. For this situation, mark out the correct statement. [Take g [...]
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12 m long weighing 24 kg ,
A uniform rod AB ,
density of water =1000 kg/m ^ 3 ] ,
is supported at end B by a flexible light string and a lead weight (of very small size) of 12kg attached at end A. The rod floats in water with one-half of its length submerged. For this situation ,
mark out the correct statement. [Take g = 10 m/s ^2 ,
A concave mirror of focal length 30 cm is placed on the flat horizontal surface with its concave side up. Water with refractive index 1.33 is poured into the lens. Where should an object be placed
08
Oct
A concave mirror of focal length 30 cm is placed on the flat horizontal surface with its concave side up. Water with refractive index 1.33 is poured into the lens. Where should an object be placed A concave mirror of focal length 30 cm is placed on the flat horizontal surface with its concave side [...]
A horizontally oriented tube AB of length l = 2.5 m rotates with a constant angular velocity ω = 5 rad s about a stationary vertical axis OO’ passing through the end A (fig). The tube is filled with an ideal fluid. The end A of the tube is open, the closed end B has a very small orifice. Find the velocity of the fluid relative to the tube as a function of the column ‘height’ h = 1 m.
08
Oct
A horizontally oriented tube AB of length l = 2.5 m rotates with a constant angular velocity ω = 5 rad s about a stationary vertical axis OO’ passing through the end A (fig). The tube is filled with an ideal fluid. The end A of the tube is open, the closed end B has [...]