Home
Class 12
CHEMISTRY
Calculate the energy in joule correspond...

Calculate the energy in joule corresponding to light of wavelength `45 nm` :
(Planck' constant `h = 6.63 xx 10^-34 Js` , speed of light `c = 3 xx 10^8 ms^-1`)

A

`4.42 xx10^(-15) j`

B

`4.42 xx10^(-18) j`

C

`6.67 xx10^(-15) j`

D

`6.67 xx10^(-11) j`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

The energy of a photon wavelength k = 1 meter is (Planck's constant = 6.625 xx 10^(-34) Js, speed of light = 3 xx 10^(8) m//s )

Derive an expression for the total energy of electron in n^(th) Bohr orbit. Hence show that energy of the electron is inversely proportional to the square of principal quantum number. Also define binding energy. The photoelectric threshold wavelength of a metal is is 230nm . Determine the maximum kinetic energy in joule and in eV of the ejected electron for the metal surface when it is exposed to a radiation of wavelength 180nm . [Plank's constant: h=6.63xx10^(-34)Js , Velocity of light: c=3xx10^(8)m//s ]

If a semiconductor photodiode can detect a photon with a maximum wavelength of 400 nm, then its band gap energy is : Planck's constant h= 6.63 xx 10^(-34) J.s Speed of light c= 3xx10^8 m//s

A 2 mW laser operates at a wavelength of 500 nm. The number of photons that will be emitted per second is: [Given Planck’s constant h = 6.6 xx 10^(-34)Js , speed of light c = 3.0 xx 10^(8) m//s ]

Light of wavelength 3000 Å falls on a metal surface having work function 2.3 eV. Calculate the maximum velocity of ejected electrons. (Planck's constant , h = 6.63 xx 10 ^( - 34 ) J.s. , velocity of light c = 3 xx10 ^( 8 ) m//s , mass of an electron = 9.1 xx 10 ^( -31 ) kg )

The threshold wavelenght of silver is 3800 Å . Calculate the maximum kinetic energy in eV of photoelelctrons emitted, when ultraviolet light of wavelegth 2600 Å falls on it. ( Planck's constant, h=6*63xx10^(-34)"Js",. Velocity of light in air, c=3xx10^(8)m//s )