Who invented the practical electric light bulb?, Thomas Edison, Isaac Newton, Who is known for inventing the telephone?, James Clerk Maxwell, Alexander Graham Bell, Who formulated the laws of motion and gravity?, Thomas Edison, Isaac Newton, Who developed the electromagnetic theory of light?, Alexander Graham Bell, James Clerk Maxwell, Who made important contributions to the invention and improvement of electrical devices?, Thomas Edison, James Clerk Maxwell, Who worked on transmitting sound over long distances?, Alexander Graham Bell, Isaac Newton.

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