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北美留学生作业代写:光学实验

为了进行这个实验,杨让一束光穿过针孔,打在卡片上。他推断,如果光线中含有粒子或简单的直线光线,不被不透明卡片阻挡的光线就会穿过缝隙,以直线的形式进入屏幕,在那里会形成两个亮点。这不是杨所观察到的。相反,他在屏幕上看到了一个由亮带和暗带交替组成的条形码图案。为了解释这种意想不到的模式,他想象光像波浪一样穿过空间,有波峰和波谷。按照这种思路,他得出结论,光波穿过每一个狭缝,形成两个独立的波阵面。当这些波阵面到达屏幕时,它们互相干扰。明亮的光带形成于两个波峰重叠并叠加在一起的地方。在波峰和波谷排列并完全相互抵消的地方形成了暗带。杨的工作激发了人们对光的一种新的思考方式。科学家们开始参考光波,并相应地重新塑造了他们对反射和折射的描述,注意到光波仍然遵循反射和折射的定律。顺便说一句,光波的弯曲解释了我们经常遇到的一些视觉现象,比如海市蜃楼。海市蜃楼是一种光学错觉,当光波从天空向地面移动时,被热空气弯曲。

北美留学生作业代写:光学实验

To run the experiment, Young allowed a beam of light to pass through a pinhole and strike the card. If light contained particles or simple straight-line rays, he reasoned, light not blocked by the opaque card would pass through the slits and travel in a straight line to the screen, where it would form two bright spots. This isn’t what Young observed. Instead, he saw a bar code pattern of alternating light and dark bands on the screen. To explain this unexpected pattern, he imagined light traveling through space like a water wave, with crests and troughs. Thinking this way, he concluded that light waves traveled through each of the slits, creating two separate wave fronts. As these wave fronts arrived at the screen, they interfered with each other. Bright bands formed where two wave crests overlapped and added together. Dark bands formed where crests and troughs lined up and canceled each other out completely.Young’s work sparked a new way of thinking about light. Scientists began referring to light waves and reshaped their descriptions of reflection and refraction accordingly, noting that light waves still obey the laws of reflection and refraction. Incidentally, the bending of a light wave accounts for some of the visual phenomena we often encounter, such as mirages. A mirage is an optical illusion caused when light waves moving from the sky toward the ground are bent by the heated air.

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