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Light – Reflection and Refraction — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceLight – Reflection and Refraction1 Mark
MCQ
A student focused the image of a distant object using a device ‘X’ on a while screen ‘S’ as shown in the figure. If the distance of the screen from the device is 40 cm, select the correct statement about the device.
  • A
    The device X is a convex lens of focal length 20 cm.
  • B
    The device X is a concave mirror of focal length 40 cm.
  • C
    The device X is a convex mirror of radius of curvature 40 cm.
  • D
    The device X is a convex lens of focal length 40 cm.
✓

Answer

  1. The device X is a convex lens of focal length 40 cm.

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