Q32 / 116 · NTA Abhyas (JEE Main) 2020 · Physics · Ray Optics

A biconvex lens of focal length f1=10 cm is placed 40 cm in front of a concave mirror of focal length f2=7.50 cm, as shown in the figure. An object, 2 cm high, is placed 20 cm to the left of the lens.

Figure

The image formed by the lens, as rays travel to the right, is

  • A
    Real and erect
  • B
    Virtual and erect
  • Correct answer
    C
    Real and inverted
  • D
    Virtual and inverted

Solution

From lens equation,

1v-1-20=110  ⇒   v=+20 cm

Magnification, m1=vu=  +20-20 =-1

Image is real, inverted, and same size as object.

Hence, the correct answer is option: 'C'.

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