Home
Class 11
CHEMISTRY
The energy of light of wavelength 45 nm ...

The energy of light of wavelength 45 nm is

A

`6.67 xx 10^(15) J`

B

`6.67 xx 10^(11) J`

C

`4.42 xx 10 ^(-18)`

D

`4.42 xx 10 ^(-15)`

Text Solution

Verified by Experts

The correct Answer is:
C
`E = hv = hc//lambda`
`= (6.626 xx 10^(-34) Js xx 3 xx 10^8 ms^(-1))/(45 xx 10^(-9)m) = 4.42 xx 10^(-18) J`.
Promotional Banner

Topper's Solved these Questions

  • QUANTUM MECHANICAL MODEL OF ATOM

    SURA PUBLICATION|Exercise ADDITIONAL QUESTIONS - CHOOSE THE CORRECT ANSWER|78 Videos

  • QUANTUM MECHANICAL MODEL OF ATOM

    SURA PUBLICATION|Exercise ADDITIONAL SHORT ANSWER|39 Videos

  • PUBLIC EXAMINATION - MARCH 2019

    SURA PUBLICATION|Exercise Part - IV|19 Videos

  • SOLUTIONS

    SURA PUBLICATION|Exercise NUMERICAL PROBLEMS|24 Videos

Similar Questions

Explore conceptually related problems

Monochromatic light of wavelength 589 nm is incident from air on a water surface. What are the wavelength, frequency and speed of refracted light? Refractive index of water is 1.33.

Find the maximum kinetic energy of the photoelectrons ejected when light of wavelength 350nm is incident on a cesium surface. Work function of cesium = 1.9 e V.

A parallel beam of light of wavelength 560 nm falls on a thin film of oil (refractive index = 1.4). What should be the minimum thickness of the film so that it strongly transmit the light ?

A convex lens of diameter 8.0 cm is used to focus a parallel beam of light of wavelength 620 nm. If the light be focused at a distance of 20 cm from the lens, what would be the radius of the central bright spot formed ?

The index of refraction of fused quartz is 1.472 for light of wavelength 400 nm and is 1.452 for light of wavelength 760 nm. Find the speeds of light of these wavelengths in fused quartz.

The maximum velocities of the photoelectrons ejected are v and 2v for the incident light of wavelength 400 nm and 250 nm on a metal surface respectively. The work function of the metal in terms of Planck's constant h and velocity of light c is