Q1. A home fragment found in a cave believed to have been inhabited by early humans contains 0.21 times as much14C as an equal amount of carbon in the atmosphere when the organism containing the bone died. Find the approximate age of the fragment. Half life of 14C is 5730 Years.
Q2. Compare to a particles with the same energy, β particles that can much more easily penetrate through matter. Why is this?
Q3. In what ways do photons resemble other particles such as electrons? In what ways do they differ? Do photons have mass? Do they have electric charge? Can they be accelerated? What mechanical properties they have?