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Mark the Correct Options. - Physics

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प्रश्न

Mark the correct options.

पर्याय

  •  If the incident rays are converging, we have a real object.

  • If the final rays are converging, we have a real image.

  • The image of a virtual object is called a virtual image.

  • If the image is virtual, the corresponding object is called a virtual object.

MCQ
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उत्तर

If the final rays are converging, we have a real image.

This is because a real image is formed by converging reflected/refracted rays from a mirror/lens.

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पाठ 18: Geometrical Optics - MCQ [पृष्ठ ४१२]

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एचसी वर्मा Concepts of Physics Vol. 1 [English] Class 11 and 12
पाठ 18 Geometrical Optics
MCQ | Q 2 | पृष्ठ ४१२

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 a convex mirror always produces a virtual image independent of the location of the object.


Use the mirror equation to deduce that the virtual image produced by a convex mirror is always diminished in size and is located between the focus and the pole.


 Define the term 'limit of resolution'?


Can a plane mirror ever form a real image?


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


following Figure shows two rays A and B being reflected by a mirror and going as A' and B'. The mirror


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


A cylindrical vessel of diameter 12 cm contains 800π cm3 of water. A cylindrical glass piece of diameter 8.0 cm and height 8.0 cm is placed in the vessel. If the bottom of the vessel under the glass piece is seen by the paraxial rays (see figure), locate its image. The index of refraction of glass is 1.50 and that of water is 1.33.


A small object is placed at the centre of the bottom of a cylindrical vessel of radius 3 cm and height 4 cm filled completely with water. Consider the ray leaving the vessel through a corner. Suppose this ray and the ray along the axis of the vessel are used to trace the image. Find the apparent depth of the image and the ratio of real depth to the apparent depth under the assumptions taken. Refractive index of water = 1.33.


Find the angle of deviation suffered by the light ray shown in figure. The refractive index μ = 1.5 for the prism material.


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?


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 parallel beam of light is allowed to fall on a transparent spherical globe of diameter 30cm and refractive index 1.5. The distance from the centre of the globe at which the beam of light can converge is ______ mm.


Car B overtakes car A at a relative speed of 40 ms-1. How fast will the image of car B appear to move in the mirror of focal length 10 cm fitted in car A, when car B is 1.9 m away from car A?


When a clock is viewed in a mirror, the needles exhibit a time which appears to be 8:20. Then the actual time will be:


An upright object is placed at a distance of 40 cm in front of a convergent lens of a focal length of 20 cm. A convergent mirror of focal length 10 cm is placed at a distance of 60 cm on the other side of the lens. The position and size of the final image will be ______.


Two plane mirrors are inclined at an angle of 40°. The possible number of images of an object placed at point P would be?


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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