A convex lens of glass has power P in air. If it is immersed in water its power will be
Sahay Sir > Question Answers > A convex lens of glass has power P in air. If it is immersed in water its power will be
A plano convex lens of refractive index 1.5 and radius of curvature 30cm. Is silvered at the curved surface. Now this lens has been used to form the image of an object. At what distance from this lens an object be placed in order to have a real image of size of the object.
17
Nov
A plano convex lens of refractive index 1.5 and radius of curvature 30cm. Is silvered at the curved surface. Now this lens has been used to form the image of an object. At what distance from this lens an object be placed in order to have a real image of size of the object. A [...]
A plano-convex lens when silvered on the plane side behaves like a concave mirror of focal length 60 cm. However when silvered on the convex side it behaves like a concave mirror of focal length 20 cm. Then the refractive index of the lens is
17
Nov
A plano-convex lens when silvered on the plane side behaves like a concave mirror of focal length 60 cm. However when silvered on the convex side it behaves like a concave mirror of focal length 20 cm. Then the refractive index of the lens is A convex lens of glass has power P in air. [...]
An equi-convex lens, having radius of curvature 33 cm is placed on a horizontal plane mirror and a pin held 20 cm above the lens coincides with its image. Now the space between the and the mirror is filled with a liquid in order to coincide with the image the pin has to be raised by 5 cm. The refractive index of the liquid is
17
Nov
An equi-convex lens, having radius of curvature 33 cm is placed on a horizontal plane mirror and a pin held 20 cm above the lens coincides with its image. Now the space between the and the mirror is filled with a liquid in order to coincide with the image the pin has to be raised [...]
A convex lenses of focal length 40 cm is held coaxially 12 cm above a concave mirror of focal length 18 cm. An object held x cm above the lens gives rise to an image coincident with it. Then x is equal to
17
Nov
A convex lenses of focal length 40 cm is held coaxially 12 cm above a concave mirror of focal length 18 cm. An object held x cm above the lens gives rise to an image coincident with it. Then x is equal to A convex lens of glass has power P in air. If it [...]
The distance between a convex lens and a plane mirror is 10 cm. The parallel rays incident on the convex lens after reflection from the mirror forms image at the optical centre of the lens. Focal length of lens will be
17
Nov
The distance between a convex lens and a plane mirror is 10 cm. The parallel rays incident on the convex lens after reflection from the mirror forms image at the optical centre of the lens. Focal length of lens will be A convex lens of glass has power P in air. If it is immersed [...]
A real image of an object is formed by a convex lens at the bottom of an empty beaker. The beaker is now filled with a liquid of refractive index 1.4 to a depth of 7 cm. In order to get the image again at the bottom, the beaker should be moved
17
Nov
A real image of an object is formed by a convex lens at the bottom of an empty beaker. The beaker is now filled with a liquid of refractive index 1.4 to a depth of 7 cm. In order to get the image again at the bottom, the beaker should be moved A convex lens [...]
An object is placed 12 cm to the left of a converging lens of focal length 8cm. Another converging lens of 6 cm focal length is placed at a distance of 30 cm to the right of the first lens. The second lens will produce
17
Nov
An object is placed 12 cm to the left of a converging lens of focal length 8cm. Another converging lens of 6 cm focal length is placed at a distance of 30 cm to the right of the first lens. The second lens will produce A convex lens of glass has power P in air. [...]
A combination of two thin lenses with focal lengths f1 and f2 respectively forms and image of distant object at distance 60cm when lenses are in contact. The position of this image shifts by 30cm towards the combination when two lenses are separated by 10 cm. The corresponding values of f1 and f2 are
17
Nov
A combination of two thin lenses with focal lengths f1 and f2 respectively forms and image of distant object at distance 60cm when lenses are in contact. The position of this image shifts by 30cm towards the combination when two lenses are separated by 10 cm. The corresponding values of f1 and f2 are A [...]
A convex lens A of focal length 20cm and a concave lens B of focal length 5cm are kept along the same axis with the distance d between them. If a parallel beam of light falling on A leaves B as a parallel beam, then the distance d is equal to
17
Nov
A convex lens A of focal length 20cm and a concave lens B of focal length 5cm are kept along the same axis with the distance d between them. If a parallel beam of light falling on A leaves B as a parallel beam, then the distance d is equal to A convex lens of [...]
A concave lens and a convex lens have same focal length of 20cm and both put in contact this combination is used to view an object 5cm long kept at 20cm from the lens combination. As compared to object the image will be
17
Nov
A concave lens and a convex lens have same focal length of 20cm and both put in contact this combination is used to view an object 5cm long kept at 20cm from the lens combination. As compared to object the image will be A convex lens of glass has power P in air. If it [...]