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Young's double slit — fringe width
β = λD/d
Where: D = screen distance (m), β = fringe width (m) / current gain, d = distance / slit separation (m), λ = wavelength (m) / decay constant
Solved example
Given: D = 7, d = 5, lamda = 10
Find: beta (fringe width (m) / current gain)
- Formula: β = D·λ/d
- Substitute the values: β = 10·7/5
- Result: β = 14 m
Answer: beta = 14 m
Calculator
How to calculate Young's double slit — fringe width
- Write down the formula: β = λD/d.
- Note the known values (D, d, λ).
- Substitute them and simplify to find beta.
- Use the calculator above to solve for any letter.
Frequently asked questions
What is the formula for Young's double slit — fringe width?
The formula is β = λD/d, where D = screen distance (m), β = fringe width (m) / current gain, d = distance / slit separation (m), λ = wavelength (m) / decay constant.
What is Young's double slit — fringe width when D = 7, d = 5, lamda = 10?
beta = 14 m. Substitute the values into β = λD/d and simplify.
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