00:02the question is a hospital uses an ultrasonic scanner to locate tumors in a tissue the operating
00:13frequency of the scanner is 4.2 megahertz the speed of sound in a tissue is 1.7 kilometer
00:22per second the wavelength of sound in the tissue is close to a 4 into 10 raised power minus 4
00:32meter
00:32b 8 into 10 raised power minus 3 meter c 4 into 10 raised power minus 3 meter d 8
00:42into 10 raised power
00:43minus 4 meter यहां पर हमें frequency और speed of sound given है तो हमें wavelength
00:51find करनी है sound key is wave velocity is calculated by using formula V is equal to lambda
01:01into F so we have to find lambda so lambda will be equal to V upon F here V is
01:13obtained as 1.7
01:15kilometer per second so first of all we will change it into meter per second so we will be obtained
01:25as
01:261.7 is 1 kilometer is equal to 1000 meter so 1000 meter per second and frequency F is obtained
01:41as
01:414.2 megahertz 4.2 megahertz is 1 megahertz is equal to 10 raised power 6 hertz so frequency will
01:58be 4.2
02:00into 10 raised power 6 hertz so wavelength will be is V is 1.7 into 1000 divided by F
02:17means frequency
02:18which is 4.2 into 10 raised power 6 hertz so after simplification we will get the value of
02:30wavelength of wavelength as 4.2 into 10 raised power minus 4 meter so the correct option will be
02:42A 4 into 10 raised power minus 4 meter
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