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............ rays produce fluorescence i...

............ rays produce fluorescence is Zinc-sulfide

A

Red

B

IR

C

Violet

D

UV

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To solve the question regarding which rays produce fluorescence in zinc sulfide, we can follow these steps: ### Step 1: Understand the Concept of Fluorescence Fluorescence is a process where a substance absorbs light or other electromagnetic radiation and then re-emits it. The emitted light usually has a longer wavelength than the absorbed light. ### Step 2: Identify the Options The options provided are: 1. Red 2. Infrared 3. Violet 4. Ultraviolet ### Step 3: Analyze Each Option - **Red Rays**: Red light has a longer wavelength and is generally not effective in causing fluorescence in many substances. - **Infrared Rays**: Infrared rays have even longer wavelengths than red light and typically do not cause fluorescence. - **Violet Rays**: Violet light is at the edge of the visible spectrum and can cause some fluorescence, but it is not the most effective. - **Ultraviolet Rays**: Ultraviolet (UV) rays have shorter wavelengths than visible light and are well-known for causing fluorescence in various materials, including zinc sulfide. ### Step 4: Conclusion Based on the analysis, the rays that produce fluorescence in zinc sulfide are **Ultraviolet rays**. Therefore, the correct answer to fill in the blank is **Ultraviolet**. ### Final Answer Ultraviolet rays produce fluorescence in zinc sulfide. ---
To solve the question regarding which rays produce fluorescence in zinc sulfide, we can follow these steps: ### Step 1: Understand the Concept of Fluorescence Fluorescence is a process where a substance absorbs light or other electromagnetic radiation and then re-emits it. The emitted light usually has a longer wavelength than the absorbed light. ### Step 2: Identify the Options The options provided are: 1. Red ...
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