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Light – Reflection and Refraction — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceLight – Reflection and Refraction1 Mark
MCQ
Study the following diagram and select the correct statement about the device 'X':
  • A
    Device 'X' is a concave mirror of radius of curvature 12cm.
  • B
    Device 'X' is a concave mirror of focal length 6cm.
  • C
    Device 'X' is a concave mirror of focal length 12cm.
  • D
    Device 'X' is a convex mirror of focal length 12cm.
✓

Answer

  1. Device 'X' is a concave mirror of focal length 12cm.

Explanation:

​​​​​​​From the figure, we can see that the light rays coming from infinity get reflected by the device 'X' and converge at a point at a distance 12cm from it. Therefore, the device 'X' is a concave mirror of focal length 12cm.

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