Question
Download Solution PDFA monochromatic ray of light is incident on a medium at an angle of 60°. The reflecting rays is found to be completely polarized. Then the refractive index of the medium is nearly
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
Polarizing angle: The angle of incidence at which a beam of unpolarized light falling on a transparent surface is reflected as a beam of completely plane polarised light is called polarizing or Brewster angle. It is denoted by ip.
Brewster's law: It states that when a ray is passed through some transparent medium having refractive index μ at any particular angle of incidence, the reflected ray is completely polarized; and the angle between reflected and refracted ray is 900.
μ = tan θB
Where μ = refractive index and θB is Brewster's angle or polarizing angle (ip).
CALCULATION:
Given that:
The angle of incidence (ip) = 60°
From Brewster’s law, the polarization angle,
So refractive index (μ) = 1.73
Hence option 3 is correct.
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