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For what distance is ray optics a good a...

For what distance is ray optics a good approximation when the aperture is 4 mm wide and the wavelength is 500 nm?

A

32 m

B

69 m

C

16 m

D

8 m

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • A beam of light consisting of two wavelengths 650 nm and 520 nm is used to obtain interference fringes in a Young's double slit experiment. (a) Find the distance of the third bright fringe on the screen from the central maximum for the wavelength 650 nm . (b) What is the least distance from the central maximum where the bright fringes due to both the wavelengths coincide? The distance between the slits is 2 mm and the distance between the plane of the slits and screen is 120 cm .

    A
    1.17 mm
    B
    2.52 mm
    C
    1.56 mm
    D
    3.14 mm

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