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Two astronauts go the surface of the moo...

Two astronauts go the surface of the moon and would speak to each other. Explain how they could achieve this.

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Absence of atmosphere on the surface of moon
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PEARSON IIT JEE FOUNDATION-WAVE MOTION AND SOUND-CONCEPT APPLICATION (LEVEL-2)
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  16. The time period of a simple pendulum is given by T = 2pi sqrt((l)/(g))...

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  17. The wavelength of a sound wave travelling in a solid becomes one third...

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  18. The oscillation of a simple pendulum is graphically represented as fol...

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  19. The oscillation of a simple pendulum is graphically represented as fol...

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  20. The oscillation of a simple pendulum is graphically represented as fol...

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