On hearing the word sky, a blue sheet appears in front of the eyes. But have you ever wondered why the sky is blue? And when ...

During autumn and winter, the sun's lower position in the sky ... red, orange, and pink hues. Cooler, drier air in fall and winter allows for fewer atmospheric particles, resulting in more vibrant ...

leaving just the orange and red light, making the sky appear red at sunset. Today we know that light scatters primarily off the air molecules themselves rather than dust particles, so Tyndall's ...