SolveStudyTextbooksGuides
search-icon-header
search-icon-image
Join / Login
  1. >>Class 12
  2. >>Physics
  3. >>Dual Nature of Radiation and Matter
  4. >>BITSAT Questions

Dual Nature Of Radiation And Matter

Physics
1009 Views

JEE MainsJEE AdvancedNEETAIIMSBITSATEasy QsMed QsHard Qs
>

The de Broglie wavelength of a neutron when its kinetic energy is K, is λ. What will be its wavelength when its kinetic energy is 4K?

A
4λ​
B
2λ​
C
2λ
D
4λ
Medium
BITSAT
View solution>

The beam of light has three wavelengths 4144A∘,4972A∘ and 6216A∘ with a total intensity of 3.6×10−3Wm2 equally distributed amongst the three wavelengths. The beam falls normally on the area 1 cm2 of a clean metallic surface of work function 2.3 eV. Assume that there is no loss of light by reflection and that each energetically capable photon ejects one electron. Calculate the number of photoelectrons liberated in 2s.

A
2×109
B
1.075×1012
C
9×108
D
3.75×106
Hard
BITSAT
View solution>