Question

Which of the following can be represented using rays?

• A. A straight river
• B. A tubelight
• C. A straight piece of string
• D. A jet of water

Answer 1

Answer: (A), (D)

The correct options are
A A straight river
D A jet of water

A river always emerges from a point. So, a straight river is an example of a ray. A tubelight has fixed length, hence it is an example of a line segment, not a ray. A straight piece of string will have fixed length, hence, it is an example of a line segment. A jet of water will emerge from a hose and continue infinitely in one direction. Therefore, it is an example of a ray.