Ask Question
9 September, 10:51

You shine light with a wavelength of 400 nm at two small slits (I and II) and observe an interference pattern on a screen. What is the difference in path lengths between the light that travels from slit I to the first dark fringe of the pattern and the light that travels from slit II to the same dark fringe?

+1
Answers (1)
  1. 9 September, 12:22
    0
    2 x 10⁻⁷ m

    Explanation:

    Since the light from two slits interfere to form dark fringe on the screen,

    the path difference must be odd multiple of λ / 2.

    Since it is the first dark fringe the factor of odd multiple must be one.

    So path difference must be

    (2n + 1) x λ / 2.

    for first dark fringe

    n = 0

    path difference = λ / 2

    400 x 10⁻⁹ / 2 m

    = 2 x 10⁻⁷ m
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “You shine light with a wavelength of 400 nm at two small slits (I and II) and observe an interference pattern on a screen. What is the ...” in 📘 Physics if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers