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Question 73Asked in RRB JE CBT-1, 20 Feb 2026, Shift 3 (4:30 PM)

A designer wants to create a device that spreads light from a small bulb to illuminate a

A designer wants to create a device that spreads light from a small bulb to illuminate a wide area uniformly. Which lens should be used and why?
  1. AA plane glass, because it transmits light without bending
  2. BA prism, because it bends light at an angle
  3. CA convex lens, because it converges light rays
  4. DA concave lens, because it diverges light rays outward
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Correct answer: (D) A concave lens, because it diverges light rays outward

From RRB JE CBT-1 PYQ 20 Feb 2026, Shift 3 (4:30 PM)

This is question 73 of RRB JE CBT-1 PYQ 20 Feb 2026, Shift 3 (4:30 PM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.