Question 15 of 29intermediate💡 UnderstandMCQ1 mark

Where should an object be placed in front of a convex lens to get a real image of the size of the object?

Exercise: EXERCISES | Q: 3 | (Page Page 26)
For More Understanding

Explanation

According to Table 9.4 in the textbook, when an object is placed at twice the focal length (At 2F₁), the image formed is at 2F₂, has the same size as the object, and is real and inverted. This is the only position where a convex lens produces a real image of the same size as the object.

Solution Steps

  1. Step 1: Refer to Table 9.4 which shows image characteristics for different object positions.

  2. Step 2: Look for the condition where image is 'Real' and 'Same size'.

  3. Step 3: The table shows: At 2F₁ → Image at 2F₂, Same size, Real and inverted.

  4. Step 4: 'At 2F₁' means 'At twice the focal length', which corresponds to Option (B).

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