Wave Optics and Introduction to Quantum Physics chpt 29 Please put your answers

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Wave Optics and Introduction to Quantum Physics chpt 29
Please put your answers next to the numbers of the problems below, and I will rate!

QUESTION 4 2 points Save Answer What is the binding energy in eV of electrons in a certain material if the longest-wavelength photon that can eject electrons is 354 mm? QUESTION 5 2 points Save Answer What is the velocity of a 0.436 kg billiard ball if its wavelength is 7.39 cm (large enough for it to interfere with other billiard balls Give your answer in 10 mls. QUESTION 6 2 points Save Answer A physicist is watching a 14.3 kg orangutan at a zoo swing lazily in a tire at the end of a rope. He (the physicist) notices that each oscillation takes 4.06 s and hypothesizes that the energy is quantized. What is the difference in energy in 10 34 joules between allowed oscillator states?

Explanation / Answer

4) lamda =354 nm

E(eV) =1243/lamda(nm)

E = 1243/354

E = 3.5 eV

5) lamda = 7.39 cm , m = 0.436 kg

from debroglie wavelength

lamda = h/p = h/mv

0.0739 = 6.63*10^-34/(0.436*v)

v = 2.06*10^-32 m/s

6) m = 14.3 kg , T = 4.06 S

f = 1/T

E = hf

E = 6.63*10^-34/4.06

E = 1.63*10^-34 J.s

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