Emission and Absorption Spectra AP Physics 2 FRQ

Emission and Absorption Spectra AP Physics 2 FRQ – Exam Style Questions etc.

Emission and Absorption Spectra AP Physics 2 FRQ

Unit 15: Modern Physics

Weightage : 15–18%

AP Physics 2 Exam Style Questions – All Topics

Question

When ¹⁰B is bombarded by neutrons, a neutron can be absorbed and an alpha particle (⁴He) emitted. If the ¹⁰B target is stationary, the kinetic energy of the reaction products is equal to the.
A) kinetic energy of the incident neutron
B) total energy of the incident neutron
C) energy equivalent of the mass decrease in the reaction
D) energy equivalent of the mass decrease in the reaction plus the kinetic energy of the incident neutron

▶️Answer/Explanation

Ans:D

Solution: This is a mass defect question. The energy released in the reaction is equal the equivalence of the missing mass comparing the products and reactants.

Question

Correct statements about the binding energy of a nucleus include which of the following?
I. It is the energy needed to separate the nucleus into its individual protons and neutrons.
II. It is the energy liberated when the nucleus is formed from the original nucleons.
III. It is the energy equivalent of the apparent loss of mass of its nucleon constituents.
A) I only
B) III only
C) I and II only
D) I, II, and III

▶️Answer/Explanation

Ans:D

Solution: These are all true statements about binding energy.

Emission and Absorption Spectra AP Physics 2 FRQ