achieve question 7

[RaghuP]

How do you use the information about the microwave radiation at 2.4 GHz in the context of this problem? I solved the question and found the wavelength is 4510 Angstroms. How do can you use this information to conclude what causes sparking?

[Michael_Kelly_2L]

You can convert the 2.4 GHz to Hz and then plug it into c=(v)(lambda) to get a wavelength. Then convert this wavelength into angstroms. This wavelength should be significantly larger than the wavelength you found before.

This indicates that the sparks cannot be caused by the photoelectric effect because in the photoelectric effect light sources with long wavelengths (low frequency) cannot eject electrons.

Hope this helps!