4. Fresnel diffraction is observed behind a wire 0.4 mm thick, which is placed 2 m from the light source of wavelength of 500 nm and 2 m from the screen. a. Find the irradiance on the axis of the screen at point P and b. Find the irradiance at the upper edge of the geometrical shadow of the diffracting wire at point P' in terms of unobstructed intensity.
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The problem states that the wire is placed 2 m from the light source and 2 m from the screen. Since the wire is placed in between the light source and the screen, the distance from the wire to the screen is also 2 m. Show more…
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