What causes a rainbow? A. There are many balloons. B. The sun shines through the rain. C. The birds build nests. 相关知识点: 试题来源: 解析 B。选项 A 有很多气球与彩虹的形成无关。选项 C 鸟儿筑巢也不是彩虹的成因。选项 B 的意思是太阳透过雨照射,这会形成彩虹。
What Causes a Rainbow?
CBS Chicago Due to the different wavelengths correlating to the colors of the rainbow, the colors typically go from red (closest to the sun) to blue (outside edges) and you can usually find the sun dog spots about 22 degrees left or right (or in both directions) from the center of the...
What Causes A Fire Rainbow? Fire rainbows or circumhorizontal arcs appear when special conditions are met. First is the passage of light through these high-level cirrus clouds at a specific angle. Next is the position of the Sun. A fire rainbow can only be witnessed when the Sun is at le...
causes objects near the horizon to appear slightly higher in the sky than they really are. Refraction is stronger for blue and green light than it is for yellow and red light, so the blue light of the sun is lifted somewhat more than the red light. This weak prismatic effect of the ...
The rainbow of colors show up once trees stop producing chlorophyll. "They start to fall typically when the photoperiod, meaning the length of the day, begins shortening," said Kira Pollack, a University of Minnesota Extension Educator.
I was excited to read this article at first; but disappointed when you didn't actually let us know the 12 different types of rainbows and what causes them! :( Hearing that there were 12 different types of rainbows was actually new and interesting to me and the only reason I "clicked" ...
(4)Whatcausesustoexploremorewhenweseetheimpossible? ___A.Thesearchforanswers.B.Thelessonfrommistakes.C.Theideaofdoubtingourselves.D.Theneedtogetendlessdetails.(5)Whatdoesthewriterthinkofbeingmisunderstood? ___A.Funny.B.Boring.C.Acceptable.D.Unbelievable. 相关知识点: 试题来源: 解析 【答案】(1...
The shape of a rainbow is a result of therefractive indexof water. This causes the sunlight to be reflected off rain droplets within a limited range of angles that lie between 0° and 42°. Most of the light is cast back at you in an angular range from 40° for violet light to 42...
Sun dogsoffer another opportunity to see fragments of rainbow in the sky. Like iridescent clouds, they too form whenever sunlight interacts withice crystals—except the crystals must be larger and plate-shaped. As sunlight hits the ice crystal plates, it isrefracted—it passes through the crystals...