Virtual image in convex lens

Steps:

• Identify the optical setup: convex lens with object placed inside the focal point.
• Apply lens formula: 1/f = 1/v - 1/u, where u is negative and |u| < f, yielding positive v (virtual image).
• Determine magnification: m = v/u > 1 (larger) and positive (upright).
• Confirm image nature: virtual, erect, and magnified compared to object.

Why B is correct:

• For a convex lens, object inside focal point produces a virtual image that is larger (magnification >1) and upright (positive m) per the sign convention in lens formula.

Why the others are wrong:

• A: Inverted images occur for real images beyond 2f, not upright virtual ones.
• C: Smaller inverted images form for objects beyond 2f in convex lenses.
• D: Smaller upright images are not typical for convex lenses; upright virtual images are enlarged.

Final answer: B