The time required for light to pass through a glass slab of 2 mm thickness is (µglass=1.5)
Correct answer: C. 10-11 s
- A. 10-8 s
- B. 10-6 s
- C. 10-11 s
- D. None of these
Explanation
The correct answer is Option C: 10-11 s. The time required for light to pass through a glass slab of 2 mm thickness with a refractive index of 1.5 can be calculated using the formula t=μx/c. By substituting the values, we get t= (1.5×2×10^−3) / (3x10^8) = 10 ^−11 sec. Options A, B, and D are incorrect because they do not correctly apply the formula or consider the given parameters.
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Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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