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प्रश्न
A coin placed at the bottom of a vessel appears to be raised when water is poured in the vessel.
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उत्तर
The coin at a appears to be at B i. e. depth of coin observed is less than the actual depth at A.
The ray of light starting from A (denser) medium bends away from the normal. Due to the Refraction of light, the coin appears at B at a lower depth. Hence, in the same way, the depth of water appears to be less deep.
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संबंधित प्रश्न
An image that cannot be obtained on a screen is called ______.
Complete the following sentence:
All the distances are measured from the .......... of a spherical mirror.
Write true or false
A virtual image formed by a spherical mirror is always erect and situated behind the mirror.
What do you understand by the focus and focal length of a spherical mirror? Show them on the separate diagrams for each of a concave mirror and a convex mirror.
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.
Define the term principal focus in case of convex mirror. Draw a convex mirror and show its principal focus and focal length clearly.
Assertion: Incident ray is directed towards the centre of curvature of spherical mirror. After reflection it retraces its path.
Reason: Angle of incidence (i) = Angle of reflection (r) = 0°
