3
Question
Assertion :Two persons on the surface of moon cannot talk to each other Reason: There is no atmosphere
Assertion :Two persons on the surface of moon cannot talk to each other Reason: There is no atmosphere
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
On earth, when two persons are talking to each other, the voice of one of the persons is a sound wave which travels through the atmosphere and reaches the ear of the other person. This is how they can talk.Sound always needs a material- medium for its travelling.On the moon there is no atmosphere. So sound cannot travel and people on Moon cannot talk to each other.
On moon in order to talk to each other, mobile phones must be used.A mobile phone converts sound waves into electromagnetic radio waves and transmits them to the receiving phone. The receiving phone converts these radio waves into sound waves and the person can hear the sound.Radio waves don't need a medium for travelling.
On earth, when two persons are talking to each other, the voice of one of the persons is a sound wave which travels through the atmosphere and reaches the ear of the other person. This is how they can talk.
Sound always needs a material- medium for its travelling.
On the moon there is no atmosphere. So sound cannot travel and people on Moon cannot talk to each other.
On moon in order to talk to each other, mobile phones must be used.
A mobile phone converts sound waves into electromagnetic radio waves and transmits them to the receiving phone. The receiving phone converts these radio waves into sound waves and the person can hear the sound.
Radio waves don't need a medium for travelling.
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