Neco Model Questions Vol1 2019 Physics Question 40
Practice objective / multiple choice question 40 from the 2019 Neco Model Questions Vol1 Physics examination.
Monochromatic light of unknown wavelength passes through a double‑slit arrangement with slit separation \(d = 0.25\ \text{mm}\). The screen is placed \(L = 2.0\ \text{m}\) from the slits. The distance between the central bright fringe and the third‑order bright fringe is measured to be \(1.44\ \text{cm}\). (a) Determine the wavelength of the light (in nanometres). (b) If the slit separation is halved while all other conditions remain unchanged, what will be the new distance between the central bright fringe and the third‑order bright fringe (in centimetres, to two decimal places)?
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About This Question
This is Neco Model Questions Vol1 2019 Physics Question 40. It is one of the objective questions from the 2019 Neco Model Questions Vol1 Physics examination.
Difficulty level: Medium .
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