Harsha was watching a programme based on ships on telivision.she saw a device attached to a ship through which the man on the ship located the enemy's submarine and sent the massages to the headquarters name the device fitted in the shipon which principal does the device workswhat values are shown by harsha



The device works based on ultrasound It enables the the ship to detect the distance and direction of submarine VALUE: harsha is scientifically enthusiastic and wants to gain knowledge
So d device is sonar is sound navigation and ranging device. Sonar is based on d principle of ultrasound. It has a transmitter n a detactor transmitter sends ultrasonic waves.these wave s travel in water n thus when dey hit an object they are sensed by a decetor. Harsh a is a enthusiastic learner she is keen to gain knowledge
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