Question

when calibrating a spectroscope, the violet spectral line should lie over the ______ mark. 550 nm 450 nm 700 nm 400 nm

Explanation:

Violet light has a shorter wavelength compared to other visible light colors. Among the given options, \(400\ nm\) is in the range of violet light wavelengths (approximately \(380 - 450\ nm\)). \(550\ nm\) is in the green - yellow range, \(700\ nm\) is in the red range, and \(450\ nm\) is on the boundary of blue - violet but \(400\ nm\) is more characteristic for calibration of the violet spectral line in a simple spectroscope context.

Answer:

\(400\ nm\)