Q28.In the given figure, the face 𝐴𝐶 of the equilateral prism is immersed in a liquid of refractive index 𝑛. For incident angle 60° at the side 𝐴𝐶, the refracted light beam just grazes along face 𝐴𝐶. The refractive index of √𝑥 the liquid 𝑛= . The value of 𝑥 is _____ . 4 (Given refractive index of glass = 1 . 5)
What This Question Tests
This question involves applying Snell's Law at the first surface and the concept of total internal reflection (grazing incidence) at the second surface of a prism.
Concepts Tested
Formulas Used
n1 sinθ1 = n2 sinθ2
sin C = n_lesser / n_denser
📚 NCERT Sections This Tests
9.21 — At What Angle Should A Ray Of Light Be Incident On The Face Of A Prism
Physics Class 12 · Chapter 9
9.21 At what angle should a ray of light be incident on the face of a prism of refracting angle 60° so that it just suffers total internal reflection at the other face? The refractive index of the material of the prism is 1.524.
9.6 — A Prism Is Made Of Glass Of Unknown Refractive Index. A Parallel
Physics Class 12 · Chapter 9
9.6 A prism is made of glass of unknown refractive index. A parallel beam of light is incident on a face of the prism. The angle of minimum deviation is measured to be 40°. What is the refractive index of the material of the prism? The refracting angle of the prism is 60°. If the prism is placed in water (refractive index 1.33), predict the new angle of minimum deviation of a parallel beam of light.
9.4 — Figures 9.27(A) And (B) Show Refraction Of A Ray In Air Incident At 60°
Physics Class 12 · Chapter 9
9.4 Figures 9.27(a) and (b) show refraction of a ray in air incident at 60° with the normal to a glass-air and water-air interface, respectively. Predict the angle of refraction in glass when the angle of incidence in water is 45° with the normal to a water-glass interface [Fig. 9.27(c)]. FIGURE 9.27
📋 Question Details
- Chapter
- Ray Optics
- Topic
- Total Internal Reflection and Refraction
- Year
- 2022
- Shift
- 26 Jul Shift 2
- Q Number
- Q28
- Type
- Numerical
- NCERT Ref
- Class 12 Physics Ch 9: Ray Optics and Optical Instruments
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