Q. Which of the following is not a part of electro magnetic radiation?

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Q. Which of the following represents IR wavelength?

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Q. Infra red radiation sources may be _______________

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Q. Every hot body emits IR radiation.

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Q. Tungsten filament lamp is a _______________

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Q. Which of the following is correct for non-thermal source?

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Q. LED and laser emit radiation in ___________

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Q. Sensing element in IR thermal detector will be ______________

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Q. Which of the following is the correct relationship for sensitivity?

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Q. Sensitivity can represent in terms of the lumen.

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Q. Basically sound waves are ______________

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Q. Which of the following is not a character of a sensor of a sound wave?

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Q. Sound waves are similar to light waves in all aspects.

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Q. SONAR stands for _______________

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Q. Which of the following type sound generators are not possible?

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Q. Mosaic regarding sonar is ____________

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Q. All elements of sonar are driven electrically.

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Q. Piezo electric materials are well cut for _____________

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Q. Which of the following can be used in sonar?

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Q. Magnetostriction transmitter uses _______________

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