Wave length of a light ray is 320 mm. What is the frequency of light at vaccum. (Speed of light 3x10^8 m//s)? At which position image of sun form by a convex lens?

The wave length of any X ray is 3 overset@A , what will be its frequency?

If the velocity of light in a medium is 2xx10^9 m//s What will be the refractive index of that medium?

Wavelength of ultraviolet light is 3 xx 10^(-5) cm . What will be the energy of a photon of this light, in eV? (c = 3 xx 10^(10) m.s^(-1))

The angle of minimum deviation for any prism ( A = 60^@ ) is 30^@ . If the velocity of light in vaccuum be 3xx 10^8 m//s then what will be its value in the prism?

The diameter of the moon is 3450 km and its distance from the earth is 3.8xx10^(5)km. What will be the diameter of the image of the moon formed by a convex mirror of focal length 7.6 m ?

An observer is moving with half the speed of light towards a stationary microwave source emitting waves at frequency 10 GHz. What is the frequency of the microwave measured by the observer? (speed of light = 3xx 10^(8) m cdot s^(-1) )

The velocity of light in a medium is 2 xx 10^8m//s . What will be the refractive index of the medium?

If the refractive index of water is (4)/(3) and the velocity of light in vacuum is 3 xx 10^(8)m * s^(-1) , how much time will light take to travel a distance of 900 m in water? '