Find the ratio of frequencies of violet light `(lambda=4.10xx10^-5cm)` to that of red light `(lambda=6.56 xx10^-5cm)`. Also determine the ratio of energies carried by them.

A dichromatic Iight of waveIengths lambda_(1) = 250 xx 10^(-9) m and lambda_(2) =350 xx 10^(-9) m are used in Young's doubIe sIit experiment. CaIcuIate the ratio of overIapped fringes due to both the waves in the obtained interference fringes.

Calculate the wavelengths in vacuum for (a) blue light ( f = 6.34 xx 10^14 Hz) and (b) Orange light ( f = 4.95 xx 10^14 Hz).

At a certain temperature, the ionisation constannt of three weak acids HA, HB and HC are 4.0xx10^(-5),5.2xx10^(-4) and 8.6xx10^(-3) , respectively. If the molar concentrations of their solutions are the same, then arrange them in order of their increasing strength.

Assume that 2xx10^(-17) J of light energy is needed by the interior of the human eye to see an object.How many photons of yellow light with lambda=595.2 nm are needed to generate this minimum energy?

Find the values of following. frac(10^3 xx 10^4)(2^5 xx 5^4)

Mean free path of benzene molecule is 2.2 times 10^-6 cm and number of molecules per unit volume is 2.79 times 10^19 cm^-3 . Determine the diameter of a benzene molecule.

A container of volume 1 L contains 2.5 times 10^23 number of nitrogen molecules. The mass of each molecule is 4.65 times 10^23 and the rms speed of the molecule is 5 times 10^4 cm.s^-1 . Determine the pressure and the total kinetic energy of the gas.

Obtain the temperature ranges for ultraviolet part of radiation of electromagnetic waves. Use the formula, lambda_m T=2.9xx10^(-3)m .K. Take frequency ranges for ultra violet part of radiation is 8xx10^14 Hz to 5xx10^17 Hz

When a certain metal was irradiated with a light of 8.1xx10^16 Hz frequency the photoelectron emitted had 1.5 times the kinetic energy as did the photoelectrons emitted when the same metal was irradiated with light 5.8xx10^16 Hz frequency if the same metal is irradiated with light 3.846 nm wavelength what will be the kinetic energy of the photoelectron emitted?