Post-UTME Physics 2005 Objective — Question 19
Question 19 of 23 from the Post-UTME Screening (Post-UTME) Physics 2005 Objective paper, with the correct answer and a full explanation.
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Which of the following colours gives the least separation when white light is dispersed by a triangular glass prism?
- A. Red and blue
- B. Yellow and greenCorrect
- C. Orange and indigo
- D. Green and violet
Explanation
Yellow and green are adjacent in the visible spectrum and have the closest refractive indices, giving the least angular separation.
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