4、Growth or movement of a sessile organism toward or away from a source of light.
8、The main source of illumination is called the key light. The key light is frequently supplemented by subsidiary lighting. The chief source of light for outdoor shooting is sunlight.
12、But during an eclipse, the source of light is blocked and the moon's disk goes unusually dark.
16、The invention of the laser provided scientists with a stronger source of light and a push that could do useful work on Earth.
1、point-source of light
6、A common laboratory source of light is provided by a mercury arc.
11、The stereo projector by polarized light include chiefly. the three parts: the objective lens system of the projection, the condensing system and a source of light.
17、Because the sun is our source of light, energy and heat, the changing intensity and concentration of its rays give rise to the seasons of winter, spring, summer and fall.
3、Love is the source of knowledge as fire is the source of light.
10、The chief deity of Zoroastrianism, the creator of the world, the source of light, and the embodiment of good.
18、The stars in centre our Milky Way Galaxy are the most significant source of light which helped to create dark reflections on the water in the middle of the frame.
7、A source of light, especially a lamp, a lantern, or an electric lighting fixture.
15、Each source of light is a different color, and the bizarre quality of the different lights sets a perfect mood for a picture of Las Vegas.
9、The sun (Surya) was one of the chief deities in the Vedas. He was recognized as the source of light (Dinkara), source of warmth (Bhaskara).
2、 A source of light, as a candle.
19、He told the Mail Online: 'the "phenomenon" has the same greenish colour as the Northern Lights. That means the Northern Lights is the source of light causing the strange phenomenon.'
5、The movement of an organism or a cell toward or away from a source of light.
14、An opaque border or pattern placed between a source of light and a photosensitive surface to prevent exposure of specified portions of the surface.
13、In Franz the word light did not evoke the picture of a landscape basking in the soft glow of day; it evoked the source of light itself: the sun, a light bulb, a spotlight.
