Physics - Study Mode

[#791] Which of the following has the highest frequency?
Correct Answer

(A) Cosmic rays

Explanation

Solution: The frequency of Gamma rays is the highest. Gamma rays are the highest energy EM radiation and typically have energies greater than 100 keV, frequencies greater than 1019 Hz, and wavelengths less than 10 picometers.

[#792] Matter waves are
Correct Answer

(A) De Broglie waves

Explanation

Solution: Matter waves are De Broglie waves.

[#793] Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in opposite direction with a speed of 20 mm/s. The distance in mm between adjacent nodes is :
Correct Answer

(A) 1.0

[#794] Intensity of any wave is proportional to which of the following?
Correct Answer

(B) Square of amplitude

Explanation

Solution: Intensity of any wave is proportional to square of amplitude.

[#795] If density of oxygen is 16 times that of hydrogen, what will be their corresponding ratio of velocity of sound?
Correct Answer

(D) 1 : 4

Explanation

Solution: The corresponding ration of velocity of sound in oxygen and hydrogen is 1:4.