Refer to the image shown to answer the question. If a light ray is reflected off the shiny surface at 170 degrees, at what angle did the light ray first strike the surface?
Incident rays are shown at 10, 30, 50, and 70 degrees. The line at 90 degrees is labeled normal. Reflected rays are shown at 110, 130, 150 and 170 degrees.

70 degrees

170 degrees

10 degrees

110 degrees

put the answers   and i could answer.

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

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