Question:
Which one of the following phenomena does not occur when a white light falls on an equilateral glass prism?
Which one of the following phenomena does not occur when a white light falls on an equilateral glass prism?
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Interference is a phenomenon that occurs due to the interaction of multiple coherent light waves, and is not a typical effect seen when light passes through a glass prism. The main effects in such a scenario are reflection, refraction, dispersion, and deviation.
Updated On: Mar 11, 2025
- Reflection
- Refraction
- Dispersion
- Deviation
- Interference
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The Correct Option is
Solution and Explanation
When white light passes through an equilateral glass prism, several phenomena occur:
- Reflection: Some portion of the light is reflected from the surface of the prism. This is a common phenomenon when light interacts with any surface.
- Refraction: Light bends as it passes from one medium (air) into another (glass) with a different refractive index. Refraction is a primary phenomenon observed when light enters and exits the prism.
- Dispersion: Dispersion occurs because the prism separates white light into its constituent colors (like a rainbow), due to the varying refractive indices for different wavelengths (colors) of light.
- Deviation: The light ray is deviated from its original path as it refracts through the prism.
However, interference does not occur in this case. Interference is a phenomenon where two or more light waves superpose to form a resultant wave, typically observed in experiments like the double-slit experiment. In the case of a prism, we do not observe interference of the light waves as they pass through; rather, we observe the effects of reflection, refraction, dispersion, and deviation.
Thus, the correct answer is option (E), Interference.
- Reflection: Some portion of the light is reflected from the surface of the prism. This is a common phenomenon when light interacts with any surface.
- Refraction: Light bends as it passes from one medium (air) into another (glass) with a different refractive index. Refraction is a primary phenomenon observed when light enters and exits the prism.
- Dispersion: Dispersion occurs because the prism separates white light into its constituent colors (like a rainbow), due to the varying refractive indices for different wavelengths (colors) of light.
- Deviation: The light ray is deviated from its original path as it refracts through the prism.
However, interference does not occur in this case. Interference is a phenomenon where two or more light waves superpose to form a resultant wave, typically observed in experiments like the double-slit experiment. In the case of a prism, we do not observe interference of the light waves as they pass through; rather, we observe the effects of reflection, refraction, dispersion, and deviation.
Thus, the correct answer is option (E), Interference.
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