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A light ray passing from air into water at an angle of 30º from the...

Physics
JAMB 2024

A light ray passing from air into water at an angle of 30º from the normal in air would 

  • A. make an angle greater than 30\(^0\) in water surface
  • B. be completely absorbed by the water surface
  • C. be completely reflected by the water surface
  • D. make an angle less than 30\(^0\) from the normal in water
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Correct Answer: Option D
Explanation

Observations show that when the light travels from a medium A(air) to a more dense medium B(water), the refracted ray bends towards the normal and the angle of refraction (r) is, therefore, less than the angle of incidence. vice versa.

There is an explanation video available below.

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Explanation Video

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WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076
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