Created by StemPy LabA physics teacher makes a double slit from two cuts in metal foil. Each cut is mm wide, and the centres of the cuts are mm apart. A laser shines through them. The screen shows fine bright lines inside one broad central band. How many fine bright lines lie in that band?
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← A telescope just resolves two stars in red light. The same telescope is then used with blue light, which has about half the wavelength. What can it do now?White light, with wavelengths from 400 nm to 700 nm, falls on a grating with a very small line spacing, so that several orders exist. Which statement about the spectra is true? →
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