Question

Two distinct sets of data can be used to see if there is any interference.

• A. Sodium lamps
• B. Fluorescent tubes
• C. Lasers
• D. None of these

Answer 1

The correct option is D

None of these

Explanation for the correct option

In the case of option D,

1. Interference cannot be caused by two independent sources.

Explanation for the correct option

In the case of option A,

1. HPS lamps, which are often used as plant grow lights, have been widely used in industrial illumination, particularly in big production plants.

In the case of option B,

1. A fluorescent lamp is made up of a glass tube filled with an argon-mercury vapor combination.
2. At each end, metal electrodes are covered with an alkaline earth oxide, which readily releases electrons.

In the case of option C,

1. A laser is a device that produces light via amplification of electromagnetic energy through optical amplification. "Light amplification through stimulated emission of radiation" is what the term "laser" stands for.

Hence, the correct option is (D).