Type the number

Exercise and reference answers

Questions

1. Answer

   1900

   Question

   Year Planck solved the blackbody problem

2. Answer

   1905

   Question

   Year Einstein explained the photoelectric effect

3. Answer

   1923

   Question

   Year Compton explained his scattering result

4. Answer

   1924

   Question

   Year de Broglie proposed matter waves

5. Answer

   1

   Question

   Electrons one photon gives all its energy to

6. Answer

   4

   Question

   Power of temperature in Stefan's law

Instructions

Type the number only.

Explanation