Q11. A candle flame of height 3cm is placed at a distance of 3m from a wall. How far from the wall must a concave mirror be placed so that it may form an image of the flame 9cm high on the wall:Physics — Optics, Nature of Light and Optical Instruments — Question 11 of 155A. 425cmB. 300cmC. 450cmD. 650cmPractice more Physics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →