Neco Model Questions Vol1 2020 Physics Question 40
Practice objective / multiple choice question 40 from the 2020 Neco Model Questions Vol1 Physics examination.
A diffraction grating produces a first‑order maximum at an angle of \(30^{\circ}\) for monochromatic light of wavelength \(600\,\text{nm}\) in air. The grating is then immersed in water whose refractive index is \(1.33\). Assuming the wavelength in water is \(\lambda' = \lambda/n\), determine the new angle (in degrees, to one decimal place) at which the first‑order maximum occurs.
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About This Question
This is Neco Model Questions Vol1 2020 Physics Question 40. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Physics examination.
Difficulty level: Medium .
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