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• CBSE×
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• Ray Optics And Optical Instruments×
• Reflection By Spherical Mirrors×

Reflection By Spherical Mirrors Free Doubts and Solutions

Derive mirror formula for concex mirror.

Asked by polyrelation 15th March 2019, 4:42 PM

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A convex mirror of radius of curvature 70 cm and a plane mirror are placed facing each other. The distance between them is 28 cm.  A point object is put midway between them on the principle axis of the mirror. Two images of the object are seen in the plane mirror. Find their distances from the plane mirror.

Asked by mridulabarua05 11th February 2019, 1:10 PM

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1. The interior of a hollow metal sphere is polished to serve as a mirror. At a point 12cm from the centre of the sphere of radius 24 cm, a point source of light is placed. Locate its image formed by two successive reflections, the first reflection taking place at the  (a) far wall (b) near wall.  2. And image produced by a concave mirror is one fourth the size of the object.  If the object is moved 10 cm towards the mirror, its image will be only half the size of the object. Calculate the focal length of the mirror.

Asked by mridulabarua05 7th February 2019, 9:10 AM

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A point luminous source P is placed on the principle axis of a concave mirror of radius of radius of curvature 1m at a distance of 75 cm from its pole. At what distance from the concave mirror should a plane mirror be set so that the rays from P, after reflection from the concave mirror and then from the plane mirror again converge at the point P? Does the point of convergence of the rays change if they are first reflected at the plane mirror and then at the concave mirror?

Asked by mridulabarua05 2nd February 2019, 11:23 AM

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sign convention in ray optics

Asked by mkiruthiga90 14th December 2018, 7:32 PM

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An object 4cm in size, is placed at 25cm infront of a concave mirror of focal length 15cm. At what distance from the mirror whould a screen be placed in order to obtain a sharp image?Find the nature and the size of the image.

Asked by amarapurevathi 5th October 2018, 12:22 PM

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Use the mirror formula to show that  a)an object placed between f and 2f of a concave mirror produces a real image  beyond 2f b)a convex mirror always produces a virtual image independent of the location of the object c)an object placed between the pole and focus of a concave mirror produces virtual and enlarged image

Asked by vasturushi 2nd February 2018, 6:58 PM

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how can the real image of an object be obtained with a convex mirror?

Asked by vinodjoshi112233 10th December 2017, 8:13 PM

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A mirror is inclined at an angle of theta with the horizontal. If a ray of light is incident at an angle theta with the mirror ,then the angle made by reflected ray with the horizontal is Asked by ajeet 14th October 2017, 11:05 AM

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the wall of the room is covered with a perfect plane mirror and two movie films are made one recording the movement of a man and the other of his mirror image  while viewing the film later can an outsider tell which is which ?

Asked by vinodjoshi112233 20th September 2017, 4:02 PM

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A point object O is placed between two plane mirror M1 and M2 10mm apart.The distance of object O from M2 is 2mm.Find the distance of the first three images formed by mirror M2.

Asked by Balbir 9th August 2017, 6:29 PM

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1.draw a ray diagram to show the formation of the real imageof a point object due to a convex spherecial refracting surface when a ray of light is travelling from a rarer medium of refractive index u 2 .hence derive the relation between object object distance image distance and radiusof curvature of the spherical surface .

Asked by mahamood.iphone 5th January 2016, 4:03 PM

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give an example of mirror whose magnification is -1

Asked by Navya Benny 21st July 2015, 10:38 PM

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An object is placed 15 cm in front of a convex lens of focal length 10 cm. Find the nature and position of the image formed. Where should a concave mirror of radius of curvature 20 cm be placed so that the final image is formed at the position of the object itself?

Asked by Topperlearning User 10th July 2015, 8:53 AM

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establish the relation 1/u+1/v=1/f for a concave mirror forming virtual image

Asked by uttam kumar 23rd February 2015, 9:31 AM

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A point object O is kept at a distance of 30 cm from a convex lens of power +4D towards its left. It is observed that when a convex mirror is kept on the right side at a distance of 50 cm from the convex lens, the image of the object O formed by the lens-mirror combination coincides with the object itself. Calculate the focal length of the convex mirror

Asked by Indra 1st February 2015, 7:53 PM

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What are virtual and real images exactly? and would you derive me mirror equation?

Asked by divyashrisureshbabu 11th October 2014, 1:59 PM

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derivation of mirror equation?? and its uses?

Asked by Tanmai Reddy 11th August 2014, 10:02 PM

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A convex lens of refractive index 1.5 has a focal length of cm in air. Calculate the change in its focal length when it is immersed in water of refractive index Asked by Topperlearning User 7th July 2014, 6:21 PM

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Show the variation of u in case of a convex mirror?

Asked by Topperlearning User 7th July 2014, 5:58 PM

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two plane mirrors inclined at 65 degree.a ray of light incident on one mirror at angle alpha,is rendered parallel to the first mirror after two reflections.then alpha is?

Asked by gokul 22nd June 2014, 1:58 PM

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Deviation of ray of light after undergoing succesive reflection from two PLANE mirrors inclined at certain angle is 288 degree,number of images formed is

Asked by gokul 22nd June 2014, 1:53 PM

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Use mirror formula to show that for an object lying between the pole and focus of a concave mirror, the image formed is always virtual in nature.

Asked by Topperlearning User 4th June 2014, 1:23 PM

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Prove that for a mirror, the radius of curvature is twice the focal length.

Asked by Topperlearning User 4th June 2014, 1:23 PM

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Illustrate the wavefront associated with reflection of light from a concave mirror.

Asked by Topperlearning User 4th June 2014, 1:23 PM

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What is the difference between virtual images produced by a concave mirror and a convex mirror?

Asked by Topperlearning User 4th June 2014, 1:23 PM

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How is the reflection of light from a mirror different from total internal reflection of light?

Asked by Topperlearning User 4th June 2014, 1:23 PM

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A square loop of wire of side 4 cm is placed 20 cm away from a concave mirror of focal length 8 cm. What is the area enclosed by the image of the wire (assume that the centre of the loop is on the axis of the mirror and the two sides are normal to the axis)?

Asked by Topperlearning User 20th May 2014, 1:08 PM

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An object is kept in front of a concave mirror of focal length 12 cm. Calculate two possible distances of the object from the mirror, for which a magnification of 3 is obtained.

Asked by Topperlearning User 20th May 2014, 1:02 PM

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The image formed of an object, placed 20 cm from a concave mirror, is four times the size of the image formed of the same object when placed 45 cm from the mirror. In both cases, the image formed was real. What is the focal length of the mirror?

Asked by Topperlearning User 20th May 2014, 12:53 PM