Q17.Time taken by light to travel in two different materials ๐ด and ๐ต of refractive indices ๐๐ด and ๐๐ต of same thickness is ๐ก1 and ๐ก2 respectively. If ๐ก2 - ๐ก1 = 5 ร 10-10s and the ratio of ๐๐ด to ๐๐ต is 1: 2. Then the thickness of material, in meter is: (Given ๐ฃ๐ด and ๐ฃ๐ต are velocities of light in ๐ด and ๐ต materials respectively). (1) 5 ร 10-10๐ฃ๐ด m (2) 5 ร 10-10 m (3) 1 . 5 ร 1010 m (4) 5 ร 10-10๐ฃ๐ต m
What This Question Tests
This question relates the time taken by light to travel through different media to their refractive indices and speeds, requiring algebraic manipulation to find the thickness of the material.
Concepts Tested
Formulas Used
ฮผ = c/v
t = d/v
๐ NCERT Sections This Tests
10.3 โ (A) The Refractive Index Of Glass Is 1.5. What Is The Speed Of Light In
Physics Class 12 ยท Chapter 10
10.3 (a) The refractive index of glass is 1.5. What is the speed of light in glass? (Speed of light in vacuum is 3.0 ร 108 m sโ1) (b) Is the speed of light in glass independent of the colour of light? If not, which of the two colours red and violet travels slower in a glass prism?
10.1 โ Monochromatic Light Of Wavelength 589 Nm Is Incident From Air On A
Physics Class 12 ยท Chapter 10
10.1 Monochromatic light of wavelength 589 nm is incident from air on a water surface. What are the wavelength, frequency and speed of (a) reflected, and (b) refracted light? Refractive index of water is 1.33.
9.4 โ Figures 9.27(A) And (B) Show Refraction Of A Ray In Air Incident At 60ยฐ
Physics Class 12 ยท Chapter 9
9.4 Figures 9.27(a) and (b) show refraction of a ray in air incident at 60ยฐ 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 45ยฐ with the normal to a water-glass interface [Fig. 9.27(c)]. FIGURE 9.27
๐ Question Details
- Chapter
- Ray Optics
- Topic
- Refractive Index and Speed of Light
- Year
- 2022
- Shift
- 25 Jul Shift 1
- Q Number
- Q17
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 9: Ray Optics and Optical Instruments
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