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An electric bell operated within an evacuated bell jar enables us to infer correctly that

An electric bell operated within an evacuated bell jar enables us to infer correctly that

A. light waves require a medium for transmission
B. sound waves do not require a medium for transmission
C. light waves do not require a medium for transmission but sound waves do
D. light waves travel much faster than sound waves
E. light waves and sound waves travel at the same speed




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