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A collimated beam of laser light of wavelength 514 nm is normally incident on a smooth glass slab placed in air. Given the refractive indices of glass and air are 1.47 and 1.0, respectively, the percentage of light intensity reflected back is (A) 0 (B) 4.0 (C) 3.6 (D) 4.2?
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A collimated beam of laser light of wavelength 514 nm is normally inci...
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A collimated beam of laser light of wavelength 514 nm is normally inci...
Calculation of the percentage of light intensity reflected back


Given:

- Wavelength of laser light, λ = 514 nm
- Refractive index of glass, n1 = 1.47
- Refractive index of air, n2 = 1.0

Formula:

- The reflection coefficient, R = ((n1 - n2)/(n1 + n2))^2

Calculation:

- Substituting the given values into the formula, we have
R = ((1.47 - 1.0)/(1.47 + 1.0))^2
R = (0.47/2.47)^2
R = (0.190)^2
R ≈ 0.0361

Percentage of light intensity reflected back:

- The percentage of light intensity reflected back is given by the reflection coefficient multiplied by 100.
- Percentage of light intensity reflected back = R × 100
- Percentage of light intensity reflected back ≈ 0.0361 × 100
- Percentage of light intensity reflected back ≈ 3.61%

Final Answer:

The percentage of light intensity reflected back is approximately 3.6%. Therefore, the correct option is (C) 3.6.
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A collimated beam of laser light of wavelength 514 nm is normally incident on a smooth glass slab placed in air. Given the refractive indices of glass and air are 1.47 and 1.0, respectively, the percentage of light intensity reflected back is (A) 0 (B) 4.0 (C) 3.6 (D) 4.2?
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A collimated beam of laser light of wavelength 514 nm is normally incident on a smooth glass slab placed in air. Given the refractive indices of glass and air are 1.47 and 1.0, respectively, the percentage of light intensity reflected back is (A) 0 (B) 4.0 (C) 3.6 (D) 4.2? for IIT JAM 2024 is part of IIT JAM preparation. The Question and answers have been prepared according to the IIT JAM exam syllabus. Information about A collimated beam of laser light of wavelength 514 nm is normally incident on a smooth glass slab placed in air. Given the refractive indices of glass and air are 1.47 and 1.0, respectively, the percentage of light intensity reflected back is (A) 0 (B) 4.0 (C) 3.6 (D) 4.2? covers all topics & solutions for IIT JAM 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A collimated beam of laser light of wavelength 514 nm is normally incident on a smooth glass slab placed in air. Given the refractive indices of glass and air are 1.47 and 1.0, respectively, the percentage of light intensity reflected back is (A) 0 (B) 4.0 (C) 3.6 (D) 4.2?.
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