Question

What do black lines on a spectrum produced by a spectroscope indicate?
Wavelengths of light emitted by an element
The intensity of light and element emits
The intensity of light an element absorbs
Wavelengths of light absorbed by an element

Answer 1

Black lines on a spectrum produced by a spectroscope indicate the wavelengths of light absorbed by an element. These lines, known as absorption lines, represent specific wavelengths where the element has absorbed light, resulting in the absence of light at those wavelengths in the spectrum.