Chapter 26 – Geometrical Optics
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A convex lens of focal length 10cm is painted black at the middle portion as shown in figure . An object is placed at a distance 20cm from the lens. Then,
15
Nov
A convex lens of focal length 10cm is painted black at the middle portion as shown in figure . An object is placed at a distance 20cm from the lens. Then, A convex lens of focal length 10cm is painted black at the middle portion as shown in figure . An object is placed at [...]
A point object is placed at a distance of 25 cm from a convex lens of focal length 20 cm. If a glass slab of thickness t and refractive index 1.5 is inserted between the lens and the object, the image is formed at infinity. The thickness t is
15
Nov
A point object is placed at a distance of 25 cm from a convex lens of focal length 20 cm. If a glass slab of thickness t and refractive index 1.5 is inserted between the lens and the object, the image is formed at infinity. The thickness t is A point object is placed at [...]
A parallel beam of light is incident on the system of two convex lenses of focal lengths f1 = 20 cm and f2 = 10 cm. What should be the distance between the two lenses so that rays after refraction from both the lenses pass undeviated.
15
Nov
A parallel beam of light is incident on the system of two convex lenses of focal lengths f1 = 20 cm and f2 = 10 cm. What should be the distance between the two lenses so that rays after refraction from both the lenses pass undeviated. Angle of minimum deviation is equal to the angle [...]
A plano-convex lens fits exactly into a plano-concave lens. Their plane surfaces are parallel to each other. If the lenses are made of different material of refractive indices μ1 and μ2 and R is the radius of curvature of the curved surface of the lenses, then focal length of the combination is :
15
Nov
A plano-convex lens fits exactly into a plano-concave lens. Their plane surfaces are parallel to each other. If the lenses are made of different material of refractive indices μ1 and μ2 and R is the radius of curvature of the curved surface of the lenses, then focal length of the combination is : Angle of [...]
One of the refracting surfaces of a prism of angle 30^∘ is silvered. A ray of light incident at angle of 60^∘ retraces its path. The refractive index of the material of prism is
15
Nov
One of the refracting surfaces of a prism of angle 30^∘ is silvered. A ray of light incident at angle of 60^∘ retraces its path. The refractive index of the material of prism is One of the refracting surfaces of a prism of angle 30^∘ is silvered. A ray of light incident at angle of [...]
Angle of minimum deviation is equal to the angle of prism A of an equilateral glass prism. The angle of incident at which minimum deviation will be obtained is
15
Nov
Angle of minimum deviation is equal to the angle of prism A of an equilateral glass prism. The angle of incident at which minimum deviation will be obtained is Angle of minimum deviation is equal to the angle of prism A of an equilateral glass prism. The angle of incident at which minimum deviation will [...]
The refractive index of a prism is 2. The prism can have a maximum refracting angle of
15
Nov
The refractive index of a prism is 2. The prism can have a maximum refracting angle of The refractive index of a prism is 2. The prism can have a maximum refracting angle of November 15, 2020 Category: Cengage JEE Mains Physics by B.M Sharma , Chapter 26 - Geometrical Optics ,
The image of point P when viewed from top of the slabs will be :
15
Nov
The image of point P when viewed from top of the slabs will be : The image of point P when viewed from top of the slabs will be November 15, 2020 Category: Cengage JEE Mains Physics by B.M Sharma , Chapter 26 - Geometrical Optics ,
Refraction takes place at a convex spherical boundary separating glass-air medium. For the image to be real, the object distance (μg=3/2) should be /is
15
Nov
Refraction takes place at a convex spherical boundary separating glass-air medium. For the image to be real, the object distance (μg=3/2) should be /is Refraction takes place at a convex spherical boundary separating glass-air medium. For the image to be real the object distance (μg=3/2) should be /is November 15, 2020 Category: Cengage JEE Mains [...]
Consider the situation shown in figure. Water (μ=4/3) is filled in a beaker up to a height of 10cm. A plane mirror is fixed at a height of 5 cm from the surface of water. Distance of image from the mirror after reflection from it of an object O at the bottom of the beaker is
15
Nov
Consider the situation shown in figure. Water (μ=4/3) is filled in a beaker up to a height of 10cm. A plane mirror is fixed at a height of 5 cm from the surface of water. Distance of image from the mirror after reflection from it of an object O at the bottom of the beaker [...]