Give the ratio of velocities of light waves of wavelengths `4000 lambda` and `8000 lambda` in vacumm.

Give the ratio of velocities of light rays of wave length 4000A^@ and 6000^@ in vacuum.

Give the ratio of velocities of light rays of equal wavelength in vacuum.

What is the ratio of velocities of light rays of wavelength 5,000 overset @ A and 7,000 overset @A in vacuum?

What is the ratio of velocity of light of wavelengths 4000 oversetcircA and 8000 oversetcircA in vacuum?

Give relation among the speed of sound v, wavelength lambda and frequency v.

For constructive interfrence to take place between two monochromatic light waves of wavelength lambda ,the path difference should be

What is the ratio of speed of gamma rays and radio waves in vacumm?

Wavelength of light used in an opticla instrument are lambda_1=4,000 overset@A and lambda_2=5,000 overset @A ,then ratio of their respective resolving powers(corresponding to lambda_1 and lambda_2 ) is: