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⚛️ Physics  ·  Ray Optics and Optical Instruments  ·  NEET & JEE

Apparent depth of an object at real depth d in a medium of refractive index n:

Answer: d/n.

  • A nd
  • B d/n
  • C d x n<sup>2</sup>
  • D d/(n<sup>2</sup>)

Correct answer: B. d/n

Explanation: Apparent depth = real depth / refractive index = d/n. Objects appear shallower when viewed from above.

Concave mirror ray diagram with an object drawn as a candle on the principal axis, the focal point F marked, and the parallel ray and focal ray reflecting to form an inverted real image

Concave mirror ray construction: a ray parallel to the axis reflects through F, and a ray through F reflects parallel, locating the inverted real image. Image: Maxmath12, CC0, via Wikimedia Commons.

Concept context

Reflection, refraction, lenses, mirrors, total internal reflection.

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