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Setler [38]
3 years ago
6

Suppose our apparatus will only allow us to distinguish the first order bright fringe from the central bright spot if they are s

eparated by at least 5º. Find the shortest wavelength of light for which this apparatus is useful
Physics
1 answer:
ozzi3 years ago
3 0

Answer:

λ = 8.716 mm

Explanation:

Given:

- d = 10 cm

- Q >= 5 degrees

Find:

- Find the shortest wavelength of light for which this apparatus is useful

Solution:

- The formula that relates the split difference and angle of separation between successive fringes is given by:

                                            d*sin(Q) = n*λ

Where,

λ: wavelength

d: split separation

Q: angle of separation between successive fringes

m: order number.

- Since this apparatus only shows the first order light so m =1

- the shortest possible wavelength corresponds to:

                                            d*sin(Q) = λ

                                            λ = 0.1*sin(5)

                                            λ = 8.716 mm

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