Photons that hit a rough surface will bounce off of the surface in a haphazard manner, while those that hit a smooth surface, such as a mirror, only bounce off of the surface at the same angle at which they hit the object 当光子碰到粗糙的表面时,它们会以杂乱无章的方式反弹出去,而当光子遭遇光滑的表面,譬如镜面时,他们只是以同一角度反弹出去,在这一角度它们击中了物体。
Photons that hit a rough surface will bounce off of the surface in a haphazard manner, while those that hit a smooth surface, such as a mirror, only bounce off of the surface at the same angle at which they hit the object 当光子碰到粗糙的表面时,它们会以杂乱无章的方式反弹出去,而当光子遭遇光滑的表面,譬如镜面时,他们只是以同一角度反弹出去,在这一角度它们击中了物体。
Each microsatellite would have a bistatic receiver that would not only detect radar signals bouncing off earth from its own transmitter, but also the signals sent by its neighbors, improving the resolution of the images collected 每颗微型卫星都将配备一套双稳态接收器,不仅能接收自身发射器发出的地面返回信号,也能接收其邻近微型卫星发出的信号,以此提高所采集图像的分辨率。
The main problem is that near shore, a tsunami's actual size is masked by additional waves generated as the tsunami bounces off seawalls, wraps around islands, or sloshes back and forth in a bay ? all of which make for a very tangled signal 然而主要问题是当海啸接近岸边时,冲击防波堤产生的巨浪,或是当它包围岛屿、在海湾里来回所飞溅的浪花,都会造成非常紊乱的讯号,掩盖海啸的实际大小。
As far back as the 19th century, the english scientist lord rayleigh studied how light bounces off molecules air molecules included and pointed out that the amount of such scattering, i . e . change from the original direction of light, varies inversely with the wavelength in technical terms, inversely proportional to the 4th power of the wavelength 早于19世纪,英国科学家雷利勋爵研究光线遇上分子包括空气分子时会出现改变方向的散射现象,并指出其散射程度与波长成反比。严格来说,应是和波长四次方成反比。
As far back as the 19th century, the english scientist lord rayleigh studied how light bounces off molecules ( air molecules included ) and pointed out that the amount of such scattering, i . e . change from the original direction of light, varies inversely with the wavelength ( in technical terms, inversely proportional to the 4th power of the wavelength ) 早于19世纪,英国科学家雷利勋爵研究光线遇上分子(包括空气分子)时会出现改变方向的散射现象,并指出其散射程度与波长成反比。(严格来说,应是和波长四次方成反比)。