Chapter 26 – Geometrical Optics
Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 26 - Geometrical Optics
A ray of light is incident on a glass sphere of refractive index 3/2. What should be the angle of incidence so that the ray which enters the sphere does not come out of the sphere?
15
Nov
A ray of light is incident on a glass sphere of refractive index 3/2. What should be the angle of incidence so that the ray which enters the sphere does not come out of the sphere? A ray of light is incident on a glass sphere of refractive index 3/2. What should be the angle [...]
Light is incident normally on face AB of a prism as shown in figure. A liquid of refractive index μ is placed on the face AC of the prism. The prism is made of glass of refractive index 3/2. The limit of μ for which total internal reflection takes place on face AC is :
15
Nov
Light is incident normally on face AB of a prism as shown in figure. A liquid of refractive index μ is placed on the face AC of the prism. The prism is made of glass of refractive index 3/2. The limit of μ for which total internal reflection takes place on face AC is : [...]
Critical angle of glass is θ1 and that of water is θ2 . The critical angle for water and glass surface would be (μ g = 3/2, μw = 4/3).
15
Nov
Critical angle of glass is θ1 and that of water is θ2 . The critical angle for water and glass surface would be (μ g = 3/2, μw = 4/3). Critical angle of glass is θ1 and that of water is θ2 . The critical angle for water and glass surface would be (μ g [...]
A circular beam of light of diameter d=2cm falls on a plane refractive of glass. The angle of incidence is 60^∘ and refractive index of glass is μ=3/2. The diameter of the refracted beam is
15
Nov
A circular beam of light of diameter d=2cm falls on a plane refractive of glass. The angle of incidence is 60^∘ and refractive index of glass is μ=3/2. The diameter of the refracted beam is A circular beam of light of diameter d=2cm falls on a plane refractive of glass. The angle of incidence is [...]
A ray of light falls on a transparent sphere with center at C as shown in Figure . The ray emerges from the sphere parallel to line AB. Find the refractive index of the sphere.
13
Nov
A ray of light falls on a transparent sphere with center at C as shown in Figure . The ray emerges from the sphere parallel to line AB. Find the refractive index of the sphere. A ray of light falls on a transparent sphere with center at C as shown in Figure . The ray [...]
A plastic hemisphere has a radius of curvature of 8cm and an index of refraction of 1.6 . On the axis halfway between the plane surface and the spherical one (4cm from each ) is a small object O. The distance between the two images when viewed along the axis from the two sides of the hemisphere is approximately .
13
Nov
A plastic hemisphere has a radius of curvature of 8cm and an index of refraction of 1.6 . On the axis halfway between the plane surface and the spherical one (4cm from each ) is a small object O. The distance between the two images when viewed along the axis from the two sides of [...]
A lens forms a real image of an object. The distance from the object to the lens is x cm and that from the lens to the image is y cm. The graph shows the variation of y with x. It can be deduced that the lens is
13
Nov
A lens forms a real image of an object. The distance from the object to the lens is x cm and that from the lens to the image is y cm. The graph shows the variation of y with x. It can be deduced that the lens is A beam of light propagates through a [...]
Two thin lenses are placed 5cm apart along the same axis and illuminated with a beam of light parallel to that axis. The first lens in the path of the beam is a converging lens of focal length 10cm whereas the second is a diverging lens of focal length 5cm. If the second lens if now moved toward the first, the emergent light
13
Nov
Two thin lenses are placed 5cm apart along the same axis and illuminated with a beam of light parallel to that axis. The first lens in the path of the beam is a converging lens of focal length 10cm whereas the second is a diverging lens of focal length 5cm. If the second lens if [...]
A plano-convex lens when silvered on the plane side behaves like a concave mirror of focal length 60cm. However, when silvered on the convex side, it behaves like a concave mirror of focal length 20cm.Then, the refractive index of the lens is
13
Nov
A plano-convex lens when silvered on the plane side behaves like a concave mirror of focal length 60cm. However, when silvered on the convex side, it behaves like a concave mirror of focal length 20cm.Then, the refractive index of the lens is A plano-convex lens when silvered on the plane side behaves like a concave [...]
A cube of side 2m is placed in front of a concave mirror of focal length 1m with its face A at a distance of 3m and face B at a distance of 5m form the mirror. The distance between the images of faces A and B and heights of images of A and B are , respectively,
13
Nov
A cube of side 2m is placed in front of a concave mirror of focal length 1m with its face A at a distance of 3m and face B at a distance of 5m form the mirror. The distance between the images of faces A and B and heights of images of A and B [...]