Search SchoolNGR

Saturday, 15 August 2026
Register . Login

Physics Past Questions and Answers

Topic: Critical angle and total internal reflection

Jamb Physics Questions - Critical angle and total internal reflection

Question 1:
What is the total resistance in the above diagram
  • A 5 ohms
  • B 15 ohms
  • C 25 ohms
  • D 35 ohms
  • E 45 ohms
View Answer & Explanation
Question 2:
The absolute refractive indices of glass and water are \(\frac{3}{2}\) and \(\frac{4}{3}\) respectively. The refractive index at the interface when a ray travels from water to glass is
  • A \(\frac{1}{2}\)
  • B \(\frac{8}{9}\)
  • C \(\frac{9}{8}\)
  • D \(\frac{17}{12}\)
  • E 2
View Answer & Explanation
Question 3:
If the refractive index of a medium is V2, what is the critical angle?
  • A 45<sup style='font-size: smaller;'>o</sup>
  • B 50<sup style='font-size: smaller;'>o</sup>12'
  • C 56<sup style='font-size: smaller;'>o</sup>25'
  • D 75<sup style='font-size: smaller;'>o</sup>
  • E 90<sup style='font-size: smaller;'>o</sup>
View Answer & Explanation
Question 4:
Which of the following conditions are necessary and sufficient for total internal reflection to take place at the boundary between two optical media? i. light is passing from optically denser medium to optically less dense medium. ii. light is passing from optically less dense medium to optically denser medium. iii. angle of incidence is greater. iv. angle of incidence is lesser
  • A I and ii only
  • B Ii and iii only
  • C Ii and iv only
  • D I and iii only
  • E Ii and iv only
View Answer & Explanation
Question 5:
Which of the following statements supports the assumption that light travels in straight lines?
  • A Light can be diffracted
  • B A source of light produces distinct shadows of opaque objects
  • C A source of light produces interference patterns on a suitably placed screen
  • D Light can be reflected
View Answer & Explanation