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In Young's double slit experiment, 62 fr...

In Young's double slit experiment, 62 fringes are seen in visible region for sodium light of wavelength 5893 Å. If violet light of wavelength 4359 Å is used in place of sodium light, then what is the number of fringes seen?

Text Solution

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Given data : The wavelength of Sodium light `lamda_1` = 5893 Å
The wavelength of violet light `lamda_2` = 4359 Å
No. of fringes seen for Sodium light `n_1` = 62
To find : No. of fringes seen for violet light n = ?
` n_1 lamda_1 = n_2 lamda_2`
` 62 xx 5893 = n_2 xx 4359`
`62 xx 5893 = n_2 xx 4359 = (62 xx 5893)/(4359)`
` therefore n_2 = 83.8 rArr 84`
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