Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

Q: Almost all surfaces reflect some of the light that strikes them. The still water of the lake in Figure 22.9 reflects almost all of the light that strikes it. The reflected light forms an image of nearby objects. An image is a copy of an object that is formed by reflected or refracted light. If a surface is extremely smooth, like very still water, then an image formed by reflection is sharp and clear. This is called regular reflection. If the surface is even slightly rough, an image may not form, or if there is an image, it is blurry or fuzzy. This is called diffuse reflection. Both types of reflection are represented in Figure 22.10. You can also see animations of both types of reflection at this URL: [Link] In Figure 22.10, the waves of light are represented by arrows called rays. Rays that strike the surface are referred to as incident rays, and rays that reflect off the surface are known as reflected rays. In regular reflection, all the rays are reflected in the same direction. This explains why regular reflection forms a clear image. In diffuse reflection, in contrast, the rays are reflected in many different directions. This is why diffuse reflection forms, at best, a blurry image. One thing is true of both regular and diffuse reflection. The angle at which the reflected rays bounce off the surface is equal to the angle at which the incident rays strike the surface. This is the law of reflection, and it applies to the reflection of all light. The law is illustrated in Figure 22.11 and in the animation at this URL: Mirrors are usually made of glass with a shiny metal backing that reflects all the light that strikes it. Mirrors may have flat or curved surfaces. The shape of a mirrors surface determines the type of image the mirror forms. For example, the image may be real or virtual. A real image forms in front of a mirror where reflected light rays actually meet. It is a true image that could be projected on a screen. A virtual image appears to be on the other side of the mirror. Of course, reflected rays dont actually go behind a mirror, so a virtual image doesnt really exist. It just appears to exist to the human eye and brain. Most mirrors are plane mirrors. A plane mirror has a flat reflective surface and forms only virtual images. The image formed by a plane mirror is also life sized. But something is different about the image compared with the real object in front of the mirror. Left and right are reversed. Look at the man shaving in Figure 22.12. He is using his right hand to hold the razor, but his image appears to be holding the razor in the left hand. Almost all plane mirrors reverse left and right in this way. Some mirrors have a curved rather than flat surface. Curved mirrors can be concave or convex. A concave mirror is shaped like the inside of a bowl. This type of mirror forms either real or virtual images, depending on where the object is placed relative to the focal point. The focal point is the point in front of the mirror where the reflected rays intersect. You can see how concave mirrors form images in Figure 22.13 and in the interactive animation at the URL below. The animation allows you to move an object to see how its position affects the image. Concave mirrors are used behind car headlights. They focus the light and make it brighter. They are also used in some telescopes. The other type of curved mirror, a convex mirror, is shaped like the outside of a bowl. This type of mirror forms only virtual images. The image is always right-side up and smaller than the actual object, which makes the object appear farther away than it really is. You can see how a convex mirror forms an image in Figure 22.14 and in the animation at the URL below. Because of their shape, convex mirrors can gather and reflect light from a wide area. This is why they are used as side mirrors on cars. They give the driver a wider view of the area around the vehicle

A: Concave mirrors are used
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Q: BEIJING - Astronomers have defended against rumors that the terrible earthquake and the following tsunami in Japan were closely related to or even caused by the "supermoon" that will appear in the sky on Saturday. The word "supermoon" was introduced in a report by the British newspaper Daily Mail on March 9, which said amateur scientists were warning that such an astronomical phenomenon could disturb the Earth's climate patterns and may even cause earthquakes and volcanic activity. The moon will be 356,577 kilometers from the Earth on Saturday, the closest in 19 years, and the closest point in its oval orbit coincides with a full moon, the report said. However, Saturday's moon is not actually the closest to Earth in 19 years, Tang Haiming, an astronomer with Shanghai Astronomical Observatory under the Chinese Academy of Sciences, told Xinhua News Agency. A shorter distance of 356,570 km between the two bodies was reached in January 2005, and a distance of 356,566 km was seen in December 2008. Yet some people suggest that previous supermoons have occurred prior to extreme weather events. In 1974 the phenomenon was followed by Cyclone Tracy in Darwin, Australia, and in 2005 it occurred shortly before a deadly tsunami in Indonesia. Coincidentally, two fresh disasters happened in Asia right before Saturday's supermoon. The public's concern about their connection with the moon boomed after Japan's terrible earthquake and tsunami and an earthquake in Southwest China's Yunnan province that killed 25 people on March 10. But astronomers are trying to _ people that such rumors are merely unreasonable. "A supermoon could cause high tides but has no direct relation with natural disasters such as earthquakes," Liu Jie, a researcher with the China Earthquake Network Center, told China Daily on Tuesday. "We can't find any necessary connection between previous supermoons and earthquakes. And the quake in Japan occurred because the Earth's inner energy had accumulated to some extent, and it's not related to the moon. " he said. James Garvin, chief scientist at the Goddard Space Flight Center under NASA, said in an article on NASA's website that "the effects on Earth from a supermoon are minor.""The combination of the moon being at its closest to Earth in its orbit, and being in its 'full moon' configuration ( to the Earth and sun), should not affect the inner energy balance of the Earth, since there are lunar tides every day. " Zhu Jin, curator of the Beijing Planetarium, said"the moon moves around the earth in a certain path, so each orbit has a perigee - its closest approach, and an apogee - its furthest distance.""A lunar perigee occurs once a month and there are very small differences in distances between perigees,"he said."Those tiny differences are far from enough to cause earthquakes or eruption of a volcano,"he added.

A: What's the real reason for the quake in Japan?
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Q: Mutations in the alpha-synuclein gene have been linked to rare cases of familial Parkinson's disease (PD). Alpha-synuclein is a major component of Lewy bodies (LB), a pathological hallmark of PD. Transgenic mice and Drosophila expressing either wild-type or mutant human alpha-synuclein develop motor deficits, LB-like inclusions in some neurons, and neuronal degeneration. However, the relationship between abnormal aggregates of alpha-synuclein and human dopamine (DA) neuron degeneration remains unclear. In this report, we have investigated the influence of alpha-synuclein expression on DA neurons in primary culture of embryonic human mesencephalon. Two days after culture, human DA cells were transduced with wild-type or mutant human (Ala(53)Thr) alpha-synuclein adenoviruses and maintained for 5 days. Overexpression of mutant and wild-type human alpha-synuclein resulted in 49% (P<0.01) and 27% (P<0.05) loss of DA neurons, respectively, while not affecting viability of other cells in the culture. Overexpression of rat alpha-synuclein or GFP (green fluorescent protein) had no effect on DA neuron survival. Cytoplasmic inclusions of alpha-synuclein were detected immunohistochemically in DA cells transduced with mutant human alpha-synuclein, but not wild-type alpha-synuclein. These results show that overexpression of human alpha-synuclein, particularly the mutant form, can cause human DA neuron death, suggesting that alpha-synuclein may have a primary role in the pathogenesis of PD.

A:
Which is the primary protein component of Lewy bodies?
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