NEET Physics: Refraction of light through a prism Practice Questions
9 free multiple-choice questions on Refraction of light through a prism (Optics) for NEET Physics, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. What is the phenomenon responsible for the deviation of light when it passes through a prism?
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Correct answer: C — Refraction
Refraction is the bending of light as it passes from one medium to another, which causes the deviation of light passing through a prism.
Q2. The angle subtended by the prism is known as:
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Correct answer: D — Angle of prism
The angle of prism (A) is the angle between the two refracting surfaces of the prism.
Q3. If the angle of a prism is very small, the deviation of the light ray will be:
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Correct answer: B — Almost zero
When the angle of the prism is very small, the bending of the light ray is minimal, and the deviation angle approaches zero.
Q4. Which of the following statements correctly describes the refraction of light through a prism?
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Correct answer: A — The angle of deviation changes based on the angle of the prism.
The refraction of light through a prism causes deviation, which depends on the angle of the prism and the refractive indices of the prism material.
Q5. The deviation of light through a prism is directly proportional to which of the following parameters?
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Correct answer: D — The angle of the prism
The deviation experienced by light passing through a prism is directly dependent on the angle of the prism (A) and the refractive index (μ) of the prism material. The relationship is governed by Snell's Law applied sequentially.
Q6. Dispersion of light occurs because:
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Correct answer: B — Light travels at different speeds in different colors.
Dispersion is the phenomenon where white light splits into its constituent colors (VIBGYOR) because the refractive index of the prism material is slightly different for different wavelengths (colors) of light.
Q7. If the refractive index of a glass prism is increased, how does the deviation of light passing through it generally change?
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Correct answer: B — It increases
The deviation is dependent on the difference in refractive indices across the prism. An increase in the refractive index of the prism generally leads to a larger deviation.
Q8. For a prism, the angle of minimum deviation occurs when the angle of incidence inside the prism (i) is related to the angle of the prism (A) by which condition?
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Correct answer: D — i = 2A
The condition for minimum deviation is related to the geometry formed by the prism. The minimum deviation occurs when the angle of incidence inside the prism is equal to the angle of the prism divided by two (i = A/2). This ensures the path length is minimized for a given angle of deviation.
Q9. Which phenomenon causes the bending of light as it passes from air into a glass block?
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Correct answer: D — Refraction
The bending of light as it passes from one medium to another is called refraction, which occurs due to the change in the speed of light upon entering a new medium.
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