मराठी

Write down the SI unit of focal length.

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प्रश्न

Write down the SI unit of focal length.
एका वाक्यात उत्तर
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उत्तर

SI unit of the focal length is meter.
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पाठ 6: Light - Spherical Mirrors [पृष्ठ २५८]

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फ्रँक Physics Part 1 [English] Class 9 ICSE
पाठ 6 Light
Spherical Mirrors | Q 19 | पृष्ठ २५८

संबंधित प्रश्‍न

A student obtains a sharp image of the distant window (W) of the school laboratory on the screen (S) using the given concave mirror (M) to determine its focal length. Which of the following distances should he measure to get the focal length of the mirror?


When a spherical mirror is held towards the sun and its sharp image is formed on a piece of a carbon paper for some time, a hole is burnt in the carbon paper. 

 At which point of the spherical mirror the carbon paper is placed?


When a spherical mirror is held towards the sun and its sharp image is formed on a piece of a carbon paper for some time, a hole is burnt in the carbon paper. 

What name is given to the distance between spherical mirror and carbon paper?


How is a spherical mirror used to converge a beam of light at a point? Name the type of mirror used.


Figure shows a concave mirror with its pole at P, focus F and centre of curvature C. Draw ray diagram to show the formation of image of an object OA.


Draw a ray diagram to show the formation of image by a concave mirror for the object beyond its centre of curvature. State three characteristics of the image.


For an incident ray directed towards centre of curvature of a spherical mirror the reflected ray:


An object 5 cm high forms a virtual image of 1.25 cm high, when placed in front of a convex mirror at a distance of 24 cm. Calculate:

  1. the position of the image
  2. the focal length of the convex mirror.

An object is brought towards a concave mirror. How does the position and size of the image change?

Complete the following diagrams shown in the following figures by drawing the reflected rays.


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