Comparing Light Spectra from Incandescent Bulbs, Fluorescent Tubes & Sunlight

[Precursor]

Homework Statement

What are some differences between the spectrum observed for light from the incandescent bulb, the fluorescent tube, and the spectrum observed from sunlight?

The Attempt at a Solution

I think that sunlight produces an absorption spectrum, whereas both incandescent bulb and fluorescent tube both produce an emission spectrum? Am I right on this?

 

[Precursor]

Any suggestions?

 

[tomcue]

Your understanding is partially correct. Sunlight does produce an absorption spectrum, as it contains a continuous spectrum of colors with certain wavelengths being absorbed by different elements in the sun's atmosphere. Incandescent bulbs, on the other hand, produce a continuous spectrum of light, but with a higher intensity in the red and infrared regions. This is due to the high temperature of the filament, which emits a broad range of wavelengths. Fluorescent tubes also produce a continuous spectrum, but with distinct peaks at specific wavelengths due to the presence of phosphors that emit light when excited by electricity. These differences in spectra can be attributed to the different methods of producing light in each source. Sunlight is produced by nuclear fusion in the sun's core, while incandescent bulbs and fluorescent tubes use electricity to produce light through heat and chemical reactions, respectively. Additionally, sunlight contains a higher proportion of ultraviolet and infrared light compared to artificial sources, which can have implications for human health and plant growth. Overall, the differences in spectra between these sources highlight the importance of understanding the properties and mechanisms of light production in various sources for practical and scientific applications.