Which of the following statements about electromagnetic waves, sound waves and water waves is/are correct ? 1. They exhibit reflection 2. They carry energy 3. They exert pressure 4. They can travel in vacuum Select the correct answer using the code given

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Q: 69 (NDA-I/2018)

Which of the following statements about electromagnetic waves, sound waves and water waves is/are correct ?
1. They exhibit reflection
2. They carry energy
3. They exert pressure
4. They can travel in vacuum
Select the correct answer using the code given below :

question_subject: 

Science

question_exam: 

NDA-I

stats: 

0,18,9,18,4,3,2

keywords: 

{'electromagnetic waves': [0, 0, 0, 3], 'water waves': [0, 0, 0, 2], 'sound waves': [0, 0, 2, 9], 'reflection': [1, 1, 2, 19], 'energy': [0, 0, 1, 2]}

The correct answer is option 1 - "1, 2, and 3".

Let`s analyze each statement and determine if it is correct or not:

1. They exhibit reflection: This statement is correct for all three types of waves. Electromagnetic waves, sound waves, and water waves can all exhibit reflection when they encounter a boundary or obstacle.

2. They carry energy: This statement is correct for all three types of waves. Electromagnetic waves, sound waves, and water waves all carry energy as they propagate through space or a medium.

3. They exert pressure: This statement is correct for both sound waves and water waves. Sound waves exert pressure variations in the medium through which they propagate, and water waves can also exert pressure on objects in their path. However, electromagnetic waves do not exert pressure.

4. They can travel in vacuum: This statement is incorrect. While electromagnetic waves can travel through a vacuum (such as light traveling through space), sound waves and water waves require a medium to propagate. They cannot travel in a vacuum.

Therefore, the correct answer is option 1, as it correctly states that statements 1, 2, and 3 are correct.