Choose the incorrect statement regarding Cathode rays:
Show Hint
- Cathode rays produce X-rays
- Cathode rays are electromagnetic waves
- Cathode rays travel in a straight route
- Cathode rays are fast electrons
The Correct Option is B
Solution and Explanation
Step 1: Understanding cathode rays. Cathode rays are streams of high-speed electrons emitted from the cathode in a vacuum tube. They possess mass and negative charge and exhibit particle-like properties.
Step 2: Evaluating given statements. - (A) Cathode rays produce X-rays: Correct. When cathode rays strike a metal target, X-rays are generated due to energy conversion.
- (B) Cathode rays are electromagnetic waves: Incorrect. Cathode rays are not electromagnetic waves; they are charged particles (electrons). Electromagnetic waves (like X-rays) have no charge or mass.
- (C) Cathode rays travel in a straight route: Correct. In the absence of external magnetic or electric fields, cathode rays move in straight lines.
- (D) Cathode rays are fast electrons: Correct. They consist of negatively charged high-speed electrons moving from the cathode to the anode.
Conclusion. Since cathode rays are not electromagnetic waves, option (B) is incorrect, making it the correct answer for this question.
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