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Q: An object is placed at a distance of 30 cm in front of a convex mirror of focal length 10 cm, on its principal axis. Its image is formed at:
  • A. 20 cm
  • B. a point between 0 cm and 10 cm
  • C. a point between 10 cm and 20 cm
  • D. a point between 20 cm and infinity (∝ )
Correct Answer: Option B - Given, u = 30cm f = 10cm When the object is between infinity and pole of a convex mirror a diminished virtual and erect image is formed between pole and focus. So, It image is formed at a point between 0 and 10cm.
B. Given, u = 30cm f = 10cm When the object is between infinity and pole of a convex mirror a diminished virtual and erect image is formed between pole and focus. So, It image is formed at a point between 0 and 10cm.

Explanations:

Given, u = 30cm f = 10cm When the object is between infinity and pole of a convex mirror a diminished virtual and erect image is formed between pole and focus. So, It image is formed at a point between 0 and 10cm.