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NDA 1 2024 GAT, question 90

Topic: Physics

Q90

Consider the two statements given below :

Statement-1 : Infrared waves are also called heat waves.

Statement-2 : Water molecules readily absorb infrared waves.

Select the correct answer using the code given below :

  1. (a) Both the statements are individually true and Statement-2 is the correct explanation of Statement-1.Correct answer
  2. (b) Both the statements are individually true, but Statement-2 is not the correct explanation of Statement-1.
  3. (c) Statement-1 is true, but Statement-2 is false.
  4. (d) Statement-2 is true, but Statement-1 is false.

Solution.

Answer: (a) Both the statements are individually true and Statement-2 is the correct explanation of Statement-1.

  1. Infrared radiation is readily absorbed by water and many other molecular constituents of matter, increasing internal energy and producing a heating effect.
  2. This explains the conventional name heat waves.
  3. Both statements are true and statement 2 supplies the relevant explanation.