engineering recuitment ICAR Technician 2021 Mock Test (Re-Exam) Physics Optics Refraction and Reflection
A soap film is Illuminated by a white light incident at an angle 30° Reflected light is examined by a spectroscope in which dark band corresponding to wavelength 6 × 10-7 on is found. Calculate the smallest thickness of the film [μ = 1 / √3]
1
1.57 μm
2
1.03 μm
3
2.25 μm
4
2.087 μm