An air bubble in a glass sphere having a 4cm diameter appears 1cm from the surface nearest to the eye when looked along the diameter. If µg = 1.5, the distance of the bubble from the refracting surface is:
Correct answer: A. 1.2cm
- A. 1.2cm
- B. 3.2cm
- C. 2.8cm
- D. 1.6cm
Explanation
The correct distance of the bubble from the refracting surface is 1.2cm. By applying the formula for refraction, the calculation yields this value. The other options are incorrect because of errors in applying the formula or substituting the values incorrectly.
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About Optics
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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