Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET 2010
Exam
NEET
Year
2010
Subject
Physics
Chapter
Ray Optics

NEET 2010 · Physics · Ray Optics

A ray of light travelling in a transparent medium of refractive...

A ray of light travelling in a transparent medium of refractive index μ\mu falls, on a surface separating the medium from air at an angle of incidence of 45∘45^{\circ}. For which of the following value of μ\mu the ray can undergo total internal reflection?

Options

  1. Aμ=1.33\mu=1.33
  2. Bμ=1.40\mu=1.40
  3. Cμ=1.50\mu=1.50
  4. Dμ=1.25\mu=1.25

Correct answer

C. μ=1.50\mu=1.50

Step-by-step solution

For total internal reflection i>c⇒sin⁡i>sin⁡c⇒sin⁡45∘>1μ⇒μ>2⇒μ>1.4\begin{aligned}& \mathrm{i}>\mathrm{c}\\ \Rightarrow & \sin \mathrm{i}>\sin \mathrm{c}\\ \Rightarrow & \sin 45^{{}^{\circ}}>\frac{1}{\mu}\\ \Rightarrow & \mu>\sqrt{2}\\ \Rightarrow & \mu>1.4 \end{aligned}
Practice Ray Optics on Quantrex Academy →

More from Ray Optics

A container is filled with water (μ = 4/3 ) up to a height of 24 cm. A concave mirror is… MHT CET Medical 2026The refracting angle of a prism is 'A' and its refractive index is ((A)/(2)). The minimum… MHT CET Medical 2026A circular beam of light having diameter 'd' falls on a plane liquid surface from air.… MHT CET Medical 2026What is the total optical path length of two media in contact with thicknesses of d and… MHT CET Medical 2026A beam of white light is allowed to pass through convex lens parallel to principal axis… MHT CET Medical 2026The angle of minimum deviation produced by a thin prism in air is δ_1 . What will be the… MHT CET Medical 2026A ray of light passes through four transparent media with refractive indices μ_1 , μ_2… MHT CET Medical 2026The thin prism having refracting angle 10^ ^ ∘ is made of glass of refractive index 1.42… MHT CET Medical 2026 Full Ray Optics list All NEET PYQs