Physics - Study Mode

[#771] The waves used in sonography are
Correct Answer

(D) Ultrasonic waves

Explanation

Solution: Ultrasound or ultrasonography is a medical imaging technique that uses high frequency sound waves and their echoes. The technique is similar to the echolocation used by bats, whales and dolphins, as well as SONAR used by submarines.

[#772] In the remote control of television, electromagnetic waves used are
Correct Answer

(D) Infrared

Explanation

Solution: All electromagnetic waves used are infrared.

[#773] Which one of the following is not a property of electromagnetic waves?
Correct Answer

(A) Electromagnetic waves do not show interference and diffraction.

Explanation

Solution: Electromagnetic waves do not show interference and diffraction.

[#774] Which one of the waves have the longest wavelength
Correct Answer

(B) Red

Explanation

Solution: Red has the longest wavelength.

[#775] Indicate the correct arrangement for electromagnetic radiation in order of their increasing wavelength.
Correct Answer

(D) X - rays, infrared, visible, microwave

Explanation

Solution: X - rays, infrared, visible, microwave