Question

An archaeologist finds the 14C in a sample of  of material to be decaying at 107 Bq. A modern  sample of the same material decays at 151 Bq,and assume this rate has also held in the past. The half-life of 14C is 5730 years. How old is the sample?

		8980 years
		6230 years
		17,000 years
		8530 years

2) The cosmic background radiation permeating the universe has the spectrum of a 2.7-K blackbody radiator. What is the peak wavelength of this radiation? The constant in Wien's law is 0.0029 m K. Hint: the answer should be in mm

_____mm

Answer 1

Solution

1) 2848 years(there is mistake in the given options)

2) 1.074 mm