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Question

The property of ultrasonic waves used in manufacturing emulsion for photographic films is its ________.

A
High speed
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B
High frequency
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C
Higher wavelength
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D
High amplitude
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Solution

The correct option is B High frequency
Frequencies higher than 20 kHz are called ultrasonic sound or ultrasound. The property of ultrasonic waves in manufacturing emulsion for photographic films in its high frequency.

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