Author Question: When light illuminates a grating with 7000 lines per centimeter, its second order maximum is at ... (Read 121 times)

tichca · **on:** Jul 29, 2018

When light illuminates a grating with 7000 lines per centimeter, its second order maximum is at 62.4. What is the wavelength of the light?

A)

336 nm
B)

363 nm
C)

452 nm
D)

633 nm
E)

752 nm

Question 2

Carbon-14 has a half-life of 5730 y. A sample of wood has been recovered by an archaeologist. The sample is sent to a laboratory,

where it is determined that the activity of the sample is 0.144 Bq/g. By comparing this activity with the activity of living organic matter, 0.230 Bq/g, the scientist determines how old the wood sample is, or more precisely, when the tree that the sample came from died. How old is the sample of wood?
A) 2940 y B) 3870 y C) 2630 y D) 4250 y E) 4590 y

nmyers · **Reply #1 on:** Jul 29, 2018

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