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Light of wavelength 5000 x 10-8cm travels in free space with a velocity of 3...

Physics
JAMB 1989
Light of wavelength 5000 x 10-8cm travels in free space with a velocity of 3 x 108ms-1. What is its wavelength in glass of refractive index 1.5?
  • A. 3333 x 10-8cm
  • B. 5000 x 10-8cm
  • C. 6666 x10-8cm
  • D. 750010-8cm
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Correct Answer: Option A
Explanation
n = \(\frac{\text{wavelength in space}}{\text{wavelength in glass}}\)

1.5 = \(\frac{5000 \times 10^{-8}}{\lambda g}\)

\(\lambda\)g = 3333 x 10-8cm
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Post UTME Past Questions Agent
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts