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1. Light of wavelength 580 nm is incident on a slit of width0.300 mm. An observing screen is placed 2.00 m from the slit. Discover the width of the central maximum.
1.9mm
0.26mm
1.5mm
7.7mm
3.9mm
2. In Young's two-slit experiment, a beam of light from a slit reaches at a point on the screen one wavelength behind the wave from the other slit. What is observed on the screen at that point?
Dark-bright fringe
An empty space
Dark fringe
Bright fringe
Bright-dark fringe
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