依照第二段中的“As red has a longer wavelength than any other color on the visible spectrum(光谱),it can be seen from a greater distance than other colors、”可知,由于红色在可见光谱中波长最长,因此可视距离要比其他颜色更远,这也是其能长期被用作表示“停止"的交通信号的原因。故选C、 答案:C...
UV radiation has a shorter wavelength and a higher energy level than visible light, while IR radiation has a longer wavelength and a weaker energy level. About 30 percent of the radiation striking Earth's atmosphere is immediately reflected back out to space by clouds, ice, snow, sand and ot...
Yellow has a shorter wavelength than red but a longer wavelength than green. This means that red is visible the furthest away, yellow in the middle and green the least distance away—a helpful advanced warning for needing to slow or stop. But this could be a coincidence. Red meaning stop ...
That’s because lower-frequency radar signals have a longer wavelength. This allows them to penetrate the atmosphere without losing strength and makes them less susceptible to environmental clutter and atmospheric losses. Low-band radars are also generally more power efficient when compared to...
Infrared has a longer wavelength and lower frequency than visible light. Infrared thermography is the science of detecting infrared energy emitted from an object, converting it to an apparent temperature, and displaying the result as an infrared image that is captured by a thermal camera. Thermal ...
This scattering causes the shorter-wavelength blue and green light to scatter more than the longer-wavelength red and orange light. Amazed by this scientific explanation, Emma realized that it is the scattering of light that gives sunsets their unique colors. As the sun begins to set, its ...
Infrared is an energy similar to visible light, but with a longer wavelength. Infrared energy is invisible to the human eye, however, while visible light energy is emitted by objects only at a very high temperature, infrared energy is emitted by all objects at ordinary temperatures....
A wave's wavelength and frequency are inversely proportional. Accordingly, waves with high frequencies have a short wavelength, whereas waves with low frequencies have a longer wavelength.Answer and Explanation: Given information: Velocity of the wave,...
λ is the wavelength (m) Due to the shorter wavelength (such as millimeter waves), the frequency shift is greater, making it easier to measure the resulting frequency shift. The ability to use smaller multi-element antennas and adaptive beamforming also makes millimeter waves an ideal choice fo...
When an object is approaching the antenna, the returning microwaves are compressed and thus have a shorter wavelength and higher frequency. Conversely, return waves from objects moving away are elongated and have a longer wavelength and lower frequency. By measuring this frequency shift, the speed ...