NDA 2024
- Exam
- NDA
- Year
- 2024
- Subject
- General Ability
- Chapter
- General Science
NDA 2024 · General Ability · General Science
Consider the two statements given below: Statement-1: Infrared...
Consider the two statements given below:
Statement-1: Infrared waves are also called heat waves.
Statement-2: Water molecules readily absorb infrarewaves.
Select the correct answer using the code given below:
Options
- ABoth the statements are individually true and Statement-2 is the correct explanation of Statement-1.
- BBoth the statements are individually true, but Statement-2 is not the correct explanation of Statement-1.
- CStatement-1 is true, but Statement-2 is false.
- DStatement-2 is true, but Statement-1 is false.
Correct answer
B. Both the statements are individually true, but Statement-2 is not the correct explanation of Statement-1.
Step-by-step solution
Infrared waves, also known as heat waves, are a type of electromagnetic radiation emitted by objects due to their temperature. Water molecules effectively absorb infrared waves, primarily through their vibrational modes, which results in the molecules gaining energy and contributing to heat. While it's accurate to call infrared waves "heat waves" due to their heating effect when absorbed by substances, this terminology doesn't solely stem from water's absorption behaviour. Therefore, both statements are individually correct. However, the absorption by water doesn't directly explain why infrared waves are termed heat waves in general usage.