The wavelength of a note is 3 m in air when the temperature is `17^@C`. Find the wavelength of the same note in air `37^@C`.

A black body emits radiations of maximum intensity at a wavelength of 5000 A, when the temperature of the body is 1227° C. If the temperature of the body is increased by 2227 °C, the maximum intensity of emitted radiation would be observed at

Red light of wavelength 6400 overset@A in air, has a wavelength of 4000 overset@A in glass. If the wavelength of violet light in air is 4400 overset@A , what is the wavelength in glass. (Assume R.I. for violet and red colour are same)

The velocity of sound in air at room temperature is 350 m/s .Find the frequency of second overtone of air column of length 70 cm when it is closed at one end.

The velocity of sound in air at room temperature is 350 m/s .Find the frequency of second overtone of air column of length 70 cm when it is open at both ends.

A sounding source has a frequency of 256 Hz. If the temperature of air be 27^@C , what is the wavelength of wavessent by the source? Velocity of sound in air at 0^@C , = 331 m//s .

A sound wave has wavelength 0.86m and speed 344 m//s in air. If its wavelength in a gas is 0.82m, find the speed of sound in the gas.

A light of wavelength 5000 A. is incident on a water surface of refractive index (4/3) . Find the wavelength and frequency of light in water if its frequency in air is 6 x 10^14 Hz .

Find the ratio of the de Broglie wavelengths of an electron and a proton when both are moving with the : same energy . State which of the two will have the longer wavelength in each case?

The wavelength of green colour in air and violet colour in water are 5381 overset (@)(A) and 3042 overset (@)(A) respectively . If the wavelength of green colour in water is the same as the wavelength of violet colour in air , find its value . (Assume that refrective index for green and violet colour is approximately same)

Solve the following example: A sound wave has wavelength 0.86 m and speed 344 m//s in air. If its wavelength in a gas in 0.8 m, Find the speed of sound of sound in the gas.