Material speed of light space 3 x 108 m/s water 2.25 x 108 m/s glass 2 x 108 m/s air 3 x 108 m/s
light moves from air into a new material. the greatest refraction would occur when light passes through which material? a) air b) glass c) water d) it would refract the same amount in each material.
The question is poor. Light doesn't refract on its way THROUGH anything. It refracts at the boundary BETWEEN two different media. The effect is greatest where the ratio of the speeds of light in the two media is greatest. On your list, that would be at the boundary between air or space and glass.
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d) the number of neutrons plus the number of protons
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The magnets are probably damaged or there not strong enough to attached to the refrigerator
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