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Light – Reflection and Refraction — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceLight – Reflection and Refraction1 Mark
MCQ
Study the given ray diagrams and select the correct statement from the following:
  • A
    Device X is a concave mirror and device Y is a convex lens, whose focal lengths are 20 cm and 25 cm respectively.
  • B
    Device X is a convex lens and device Y is a concave mirror, whose focal lengths are 10 cm and 25 cm respectively.
  • C
    Device X is a concave lens and device Y is a convex mirror, whose focal lengths are 20 cm and 25 cm respectively.
  • D
    Device X is a convex lens and device Y is a concave mirror, whose focal lengths are 20 cm and 25 cm respectively.
✓

Answer

  1. Device X is a convex lens and device Y is a concave mirror, whose focal lengths are 20 cm and 25 cm respectively.

Explanation:

From the given figures we can conclude that the device X is a convex lens as it converges the rays and the device Y is a concave mirror as it also converges the rays but in the same side of the mirror .Their focal lengths are 20 cm and 25 cm respectively Regards.

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