11. Which of following scientists produced coherent light in his 1801 experiment that demonstrated the wave nature of light? (A) Christiaan Huygens (B) Thomas Young (C) Albert Michelson (D) James Clerk Maxwell (E) Clinton Davisson

9. According to the First Law of Thermodynamics, if a closed system absorbs heat Q from its surroundings and does work W on its surroundings, what is the change in the internal energy of the system, ΔU? (Sign convention: heat absorbed is positive, work done by the system is positive) (A) ΔU = Q + W (B) ΔU = Q - W (C) ΔU = W - Q (D) ΔU = -Q - W

11. Which of following scientists produced coherent light in his 1801 experiment that demonstrated the wave
nature of light?

(A) Christiaan Huygens

(B) Thomas Young

(C) Albert Michelson

(D) James Clerk Maxwell

(E) Clinton Davisson

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