Chapter 26 – Geometrical Optics
Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 26 - Geometrical Optics
Statement I: A light ray is incident on a glass slab. Some portion of it is reflected and some is refracted. Refracted and reflected rays are always perpendicular to each other. Statement II: Angle of incidence is equal to angle of reflection.
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Nov
Statement I: A light ray is incident on a glass slab. Some portion of it is reflected and some is refracted. Refracted and reflected rays are always perpendicular to each other. Statement II: Angle of incidence is equal to angle of reflection. A convex mirror of radius of curvature 1.6 m has an object placed [...]
STATEMENT-1 We cannot produce a real image by plane of convex mirror under any circumstances. STATEMENT-2 The focal length of a convex mirror is always taken as positive.
15
Nov
STATEMENT-1 We cannot produce a real image by plane of convex mirror under any circumstances. STATEMENT-2 The focal length of a convex mirror is always taken as positive. STATEMENT-1 We cannot produce a real image by plane of convex mirror under any circumstances. STATEMENT-2 The focal length of a convex mirror is always taken as [...]
STATEMENT-1 The focal length of a lens does not depend on the medium in which it is submerged. STATEMENT-2 1/f = μ2 − μ1/μ1(1/R1 − 1/R2)
15
Nov
STATEMENT-1 The focal length of a lens does not depend on the medium in which it is submerged. STATEMENT-2 1/f = μ2 − μ1/μ1(1/R1 − 1/R2) STATEMENT-1 The focal length of a lens does not depend on the medium in which it is submerged. STATEMENT-2 1/f = μ2 − μ1/μ1(1/R1 − 1/R2) November 15, 2020 [...]
Statement I: A ray is incident from outside on a glass sphere surrounded by air as shown in Figure. This ray may suffer total internal reflection at the second interface. Statement II: For a ray going from a denser to rarer medium, the ray may suffer total internal reflection.
15
Nov
Statement I: A ray is incident from outside on a glass sphere surrounded by air as shown in Figure. This ray may suffer total internal reflection at the second interface. Statement II: For a ray going from a denser to rarer medium, the ray may suffer total internal reflection. A convex mirror of radius of [...]
Statement I: A beam of white light enters the curved surface of a semicircular piece of glass along the normal. The incoming beam is moved clockwise (so that the angle θ increases), such that the beam always enters along the normal to the curved side. Just before the refracted beam disappears, it becomes predominantly red. Statement II: The index of refraction for light at the red end of the visible spectrum is more than at the violet end.
15
Nov
Statement I: A beam of white light enters the curved surface of a semicircular piece of glass along the normal. The incoming beam is moved clockwise (so that the angle θ increases), such that the beam always enters along the normal to the curved side. Just before the refracted beam disappears, it becomes predominantly red. [...]
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it becomes predominantly red. Statement II: The index of refraction for light at the red end of the visible spectrum is more than at the violet end. ,
Statement I: A beam of white light enters the curved surface of a semicircular piece of glass along the normal. The incoming beam is moved clockwise (so that the angle θ increases) ,
such that the beam always enters along the normal to the curved side. Just before the refracted beam disappears ,
ACB is right-angled prism with other angles as 60^∘ and 30^∘. Refractive index of the prism is 1.5. AB has thin layer of liquid on it as shown. Light falls normally on the face AC. For total internal reflections, maximum refractive index of the liquid is
15
Nov
ACB is right-angled prism with other angles as 60^∘ and 30^∘. Refractive index of the prism is 1.5. AB has thin layer of liquid on it as shown. Light falls normally on the face AC. For total internal reflections, maximum refractive index of the liquid is A convex mirror of radius of curvature 1.6 m [...]
An object is placed at a distance of 15cm from a convex lens of focal length 10cm. On the other side of the lens, a convex mirror is placed at its focus such that the image formed by the combination coincides with the object itself. The focal length of the convex mirror is :
15
Nov
An object is placed at a distance of 15cm from a convex lens of focal length 10cm. On the other side of the lens, a convex mirror is placed at its focus such that the image formed by the combination coincides with the object itself. The focal length of the convex mirror is : a [...]
A ray of monochromatic light is incident on the refracting face of a prism (angle 75^∘0. It passes through the prism and is incident on the other face at the critical angle. If the refractive index of the prism is root 2, then the angle of incidence on the first face of the prism is
15
Nov
A ray of monochromatic light is incident on the refracting face of a prism (angle 75^∘0. It passes through the prism and is incident on the other face at the critical angle. If the refractive index of the prism is root 2, then the angle of incidence on the first face of the prism is [...]
A ray of light enters a rectangular glass slab of refractive index 3–√ at an angle of incidence 60∘. It travels a distance of 5 cm inside the slab and emerges out of the slab. The perpendicular distance between the incident and the emergent rays is
15
Nov
A ray of light enters a rectangular glass slab of refractive index 3–√ at an angle of incidence 60∘. It travels a distance of 5 cm inside the slab and emerges out of the slab. The perpendicular distance between the incident and the emergent rays is A convex mirror of radius of curvature 1.6 m [...]
A ray of light traveling in glass (μ=3/2) is incident on a horizontal glass-air surface at the critical angle θC. If a thin layer of water (μ=4/3) is now poured on the glass-air surface, the angle at which the ray emerges into air at the water-air surface is
15
Nov
A ray of light traveling in glass (μ=3/2) is incident on a horizontal glass-air surface at the critical angle θC. If a thin layer of water (μ=4/3) is now poured on the glass-air surface, the angle at which the ray emerges into air at the water-air surface is A ray of light traveling in glass [...]