Hot gases don’t produce a continuous emission spectrum. Black hydrogen absorption lines are at the same wavelength as the bright hydrogen emission lines. Key fact Line emission spectra are ...

ABSTRACT We have measured the profiles of the Ca ii H and K chromospheric emission lines in 147 main‐sequence stars of spectral type M5–K7 (masses 0.30–0.55 M⊙) using multiple high‐resolution spectra ...

This causes line emission spectra to be produced, as shown below. This is not a continuous spectrum as only light of specific frequencies and specific colours are produced. Different types of ...

Recent studies have made significant advancements in the understanding of X-ray emission spectra, particularly focusing on the Kα and Kβ lines of elements like copper and scandium. For instance ...

Alluxa introduces two Hydrogen Alpha (H-Alpha) Emission Line Filters that are revolutionizing the ultra-narrow optical filters market. Though these new filters have been specifically tailored to ...

Delta is the first major U.S. airline to say it will not rollback its climate targets after Trump withdrew the U.S. from the ...

Norwegian Cruise Line Holdings Ltd., a global leader in the ... The company aims to achieve net zero greenhouse gas (GHG) emissions by 2050, bolstered by revised short- and mid-term goals to ...

New California Air Resources Board regulations mandate exhaust emission reductions for docked car carriers and tankers.