How does a bat make use of ultrasonic waves to find its way?

Why does ultrasonic wave not exhibit polarisation?

Ultrasonic waves of frequency 4.5 MHz are used to detect tumour in soft tissues. The speed of sound in tissue is 1.5 km s^-1 and that in air is 340 m s^-1 . Find the wavelength of this ultrasonic wave in air and in tissue.

Name three animals who use ultrasonic waves. Explain atleast one animal which uses ultrasonic waves.

How does an Amoeba obtain its food?

How does an Amoeba obtain its food?

Ultrasonic and Infrasonic Waves: The sound having frequency 20 Hz to 20 KHz is called audible sound Human ear cannot hear sound of frequencies lying outside this range. The limits of audibility of sound vary from individual. Generally the upper limit decreases with increase of age of individual, usually and people can not hear sound of frequency more than 15 kHz. Sound of frequencies below 20 Hz are called infrasonics, while frequencies beyond 20 kHz are called ultrasonics. Ultrasonics can be heard by dogs, cat bats etc. Bats detect the path by means of ultrasonics. Ultrasonics can be used for diagnosis of tumour and other abnormalities within our body. This is known as ultrasonography. Ultrasonics are used to curve various diseases and to measure depth of oceans to detect submarines. The waves produced by simple pendulum (having time period 2 seconds) are A. infrasonic B. audible C. ultrasonic D. none of these

Ultrasonic and Infrasonic Waves: The sound having frequency 20 Hz to 20 KHz is called audible sound Human ear cannot hear sound of frequencies lying outside this range. The limits of audibility of sound vary from individual. Generally the upper limit decreases with increase of age of individual, usually and people can not hear sound of frequency more than 15 kHz. Sound of frequencies below 20 Hz are called infrasonics, while frequencies beyond 20 kHz are called ultrasonics. Ultrasonics can be heard by dogs, cat bats etc. Bats detect the path by means of ultrasonics. Ultrasonics can be used for diagnosis of tumour and other abnormalities within our body. This is known as ultrasonography. Ultrasonics are used to curve various diseases and to measure depth of oceans to detect submarines.Ultrasonics are used for navigation by

Ultrasonic and Infrasonic Waves: The sound having frequency 20 Hz to 20 KHz is called audible sound Human ear cannot hear sound of frequencies lying outside this range. The limits of audibility of sound vary from individual. Generally the upper limit decreases with increase of age of individual, usually and people can not hear sound of frequency more than 15 kHz. Sound of frequencies below 20 Hz are called infrasonics, while frequencies beyond 20 kHz are called ultrasonics. Ultrasonics can be heard by dogs, cat bats etc. Bats detect the path by means of ultrasonics. Ultrasonics can be used for diagnosis of tumour and other abnormalities within our body. This is known as ultrasonography. Ultrasonics are used to curve various diseases and to measure depth of oceans to detect submarines. If speed of infrasonics, a audible and ultrasonics waves are v_(i) , v_(a) and v_(u) then A. v_(i) > v_(a) > v_(u) B. v_(i) = v_(a) = v_(u) C. v_(i) D. v_(i) > v_(a) , v_(u) > v_(a)

How does the speed of sound change with change in wavelength of sound wave ?

Given below are some examples of wave motion. State in each case if the wave motion is transverse, longitudinal or a combination of both (i) Motion of a kink in a long coil spring, produced by displacing one end of the spring sideways. (ii) Waves produced in a cylinder containing a liquid, by moving its piston back and forth. (iii) Waves produced by a motor-boar sailing in water. (iv) Light waves travelling from the sun to the earth. (v) Ultrasonic waves in air, produced by a vibrating quartz crystal.