Visible Light Beams
From the side, a beam of light is only visible if part of the light is scattered by objects: tiny particles like dust, water droplets (mist, fog, rain), hail, snow, or smoke, or larger objects such as birds. If there are many objects in the light path, then it appears as a continuous beam, but if there are only a few objects, then the light is visible as a few individual bright points. In any case, this scattering of light from a beam, and the resultant visibility of a light beam from the side, is known as the Tyndall effect.
Read more about this topic: Light Beam
Famous quotes containing the words visible, light and/or beams:
“Being a parent is unlike any previous job—the results of any one action are not clearly visible for a long time, if at all.”
—Anonymous Mother. As quoted in Between Generations by Ellen Galinsky, ch. 2 (1981)
“Those shadowy recollections,
Which, be they what they may,
Are yet the fountain light of all our day,
Are yet a master light of all our seeing;”
—William Wordsworth (1770–1850)
“When Gabriel’s trumpet ends all life’s delay,
Will crash the beams of firmamental woe:
Not nature will sustain the even crime
Of death, though death sustains all nature, so.”
—Allen Tate (1899–1979)