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प्रश्न
What are the medical applications of echo?
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उत्तर
- The principle of echo is used in obstetric ultrasonography, which is used to create real-time visual images of the developing embryo or fetus in the mother’s uterus.
- This is a safe testing tool, as it does not use any harmful radiation.
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संबंधित प्रश्न
Fill in the blank with suitable word :
An echo is simply a ................... sound.
Fill in the blank with suitable word :
Echoes are caused by the ...................... of sound.
What is the minimum distance in air required from a sound reflecting surface to hear an echo (at 20°C) ?
A man standing 825 metres away from a cliff (steep rock) fires a gun. After how long will he hear its echo ? Speed of sound in air is 330 m/s.
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a bare room
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a furnished room
What is the minimum distance needed for an echo?
A man is standing between two vertical walls 680 m apart. He claps his hands and hears two distinct echoes after 0.9 seconds and 1.1 seconds respectively. What is the speed of sound in the air?
______ allows bats to navigate through dark caves and find insects for food.
Rohan conducted experiments on echo in different media. He observed that a minimum distance of 'x' meters is required for the echo to be heard in oxygen and 'y' meters in benzene. Compare 'x' and 'y'. Justify your answer.
Speed of sound in oxygen: 340 ms-1
Speed of sound in benzene: 200 ms-1
