Highlights. 1  Acute myocardial infarction is the medical name for a heart attack. 2  A number of different factors may increase your risk for a heart attack, including high blood pressure, high cholesterol, and diabetes.  Call 911 immediately if you believe you or someone you know may have had a heart attack.
The blue color of the sky is due to Rayleigh scattering. As light moves through the atmosphere, most of the longer wavelengths pass straight through. Little of the red, orange and yellow light is affected by the air. However, much of the shorter wavelength light is absorbed by the gas molecules.
Have you ever driven home from work in the evening hours and noticed the sunset? Did you ever wonder what causes such brilliant colors in the evening and when the sun rises in the morning? Beautiful shades of orange, pink, purple, and red can be best seen in the fall and winter seasons at mid-latitudes. In this post, weâll look at images of various sunrises and sunsets and explain why they show such beautiful colors!