Author Question: High-energy photons are used to bombard an unknown metal. The strongest peak is found for X-rays ... (Read 115 times)

melly21297 · **on:** Jul 29, 2018

High-energy photons are used to bombard an unknown metal. The strongest peak is found for X-rays with an energy of 66 keV. What is the atomic number of the metal?

A)

80
B)

81
C)

82
D)

83
E)

84

Question 2

Which one of the following is not a characteristic of a simple two-lens astronomical refracting telescope?

A)

The angular size of the final image is larger than that of the object.
B)

The final image is virtual.
C)

The objective forms a virtual image.
D)

The final image is inverted.