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A Point Source of Light is Placed in Front of a Plane Mirror. - Physics

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प्रश्न

A point source of light is placed in front of a plane mirror.

पर्याय

  • All the reflected rays meet at a point when produced backward.

  •  Only the reflected rays close to the normal meet at a point when produced backward.

  •  Only the reflected rays making a small angle with the mirror meet at a point when produced backward.

  • Light of different colours make different images.

MCQ
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उत्तर

All the reflected rays meet at a point when produced backward.

Here, the angle of reflection is equal to the angle of incidence. Therefore, all rays get reflected to converge at a single point to form the point image of the point source.

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पाठ 18: Geometrical Optics - MCQ [पृष्ठ ४१०]

APPEARS IN

एचसी वर्मा Concepts of Physics Vol. 1 [English] Class 11 and 12
पाठ 18 Geometrical Optics
MCQ | Q 1 | पृष्ठ ४१०

संबंधित प्रश्‍न

Calculate the distance of an object of height h from a concave mirror of radius of curvature 20 cm, so as to obtain a real image of magnification 2. Find the location of the image also.


Use the mirror equation to show that an object placed between f and 2f of a concave mirror produces a real image beyond 2f.


Use the mirror equation to show that a convex mirror always produces a virtual image independent of the location of the object.


Using mirror formula, explain why does a convex mirror always produce a virtual image.


An object is kept on the principal axis of a concave mirror of focal length 10 cm. at a distance of 15
cm from its pole. The image formed by the mirror is:

(a) Virtual and magnified

(b) Virtual and diminished

(c) Real and magnified

(d) Real and diminished


Use the mirror equation to show that an object placed between f and 2f of a concave mirror forms an image beyond 2f.


Can a plane mirror ever form a real image?


The rays of different colours fail to converge at a point after going through a converging lens. This defect is called


Mark the correct options.


A light ray falling at an angle of 45° with the surface of a clean slab of ice of thickness 1.00 m is refracted into it at an angle of 30°. Calculate the time taken by the light rays to cross the slab. Speed of light in vacuum = 3 × 108 m s−1.


Find the maximum angle of refraction when a light ray is refracted from glass (μ = 1.50) to air.


A light ray, going through a prism with the angle of prism 60°, is found to deviate by 30°. What limit on the refractive index can be put from these data?


Name the physical principle on which the working of optical fibers is based.


The figure below shows the positions of a point object O, two lenses, a plane mirror and the final image I which coincides with the object. The focal length of the convex lens is 20 cm. Calculate the focal length of the concave lens.


A point object is placed at a distance of 20 cm from a thin plano-convex lens of focal length 15 cm, if the plane surface is silvered. The image will form at:


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A point object is placed at a distance of 30 cm from a convex mirror of a focal length of 30 cm. What is the separation between the image and the object?


A convex lens of focal length 15 cm is placed coaxially in front of a convex mirror. The lens is 5 cm from the pole of the mirror. When an object is placed on the axis at a distance of 20 cm from the lens, it is found that the image coincides with the object. Calculate the radius of curvature of the mirror - (consider all-optical event): 


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