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Geometrical Optics question

2024 · 27 Jan · Shift 1 · Q74
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  5. /2024 · 27 Jan · Shift 1 · Q74

Geometrical Optics question

2024 · 27 Jan · Shift 1 · Q74

JEE MainPhysicsGeometrical OpticsMCQ+4 / −1
A convex lens of focal length 40 cm40 \mathrm{~cm}40 cm forms an image of an extended source of light on a photoelectric cell. A current I is produced. The lens is replaced by another convex lens having the same diameter but focal length 20 cm20 \mathrm{~cm}20 cm. The photoelectric current now is :
  1. A
    I2\mathrm{\frac{I}{2}}2I​
  2. B
    4 I
  3. C
    2 I
  4. D
    I
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