QuizKerala

Questions and answers

LDC Daily Quiz: Light and Optics | Kerala PSC

All 20 questions from this finished quiz, with the correct answer and explanation. Finished 2 Nov 2026, 2:18 am IST.
Free PSC questions in your emailLDC, LGS, prelims and more. Tell us your exam and get practice questions free.Sign up free
LeaderboardPlay a live quizMore past quizzes

Watch the answers video

YouTubeFacebookInstagram

  1. 1. What is the approximate speed of light in vacuum?

    A. 3 × 10^8 m/s

    B. 3 × 10^6 m/s

    C. 3 × 10^10 m/s

    D. 3 × 10^4 m/s

    Answer: A. 3 × 10^8 m/s

    Why: Light travels at about 3 × 10^8 metres per second in vacuum, which is the standard value of the speed of light c.

  2. 2. What kind of image does a plane mirror form?

    A. Real, inverted and magnified

    B. Virtual, erect and of same size

    C. Real, erect and diminished

    D. Virtual, inverted and diminished

    Answer: B. Virtual, erect and of same size

    Why: A plane mirror forms a virtual, erect image that is the same size as the object and laterally inverted.

Try the next quiz live and see your rank.

Live quizzes

Our apps on Google Play