61. Why does a red shirt look red? A) Because it absorbs red light. B) Because it is transparent to red light. C) Because it is creating and emitting red light. D) Because it absorbs all colors of light except red which is reflected. 62. Why does a black shirt look black? A) Because it absorbs black light. B) Because it is transparent to black light. C) Because it reflects black light. D) Because it absorbs all colors of light and does not reflect any colors of light. 63. Which of the following is the taking in of wave energy by a surface and converting it to a different form? A) absorption B) transmission C) refraction D) reflection 64. Which of the following is when a wave changes direction as it enters a new medium? A) absorption B) transmission C) refraction D) reflection 65. Why are sunsets and sunrises red/orange in color? A) Red color has low frequency and is scattered more B) Red color has high frequency and is scattered more C) Red color has low frequency and is scattered less D. Red color has high frequency and is scattered less 66. What is the relationship between signal quality and distance that the signal can travel? A) Low quality signals travel longer distances B) Low quality signals travel shorter distances C) High quality signals travel longer distances D) All signal qualities travel the same distance 67. Calculate the speed of light in glass that has an index of 1.627 . A) 1.4times 10^8m/s B) 1.8times 10^8m/s C) 3.0times 10^8m/s D) 4.9times 10^8m/s

Which of these statements is most likely correct about a weak nuclear force? (2 points) It binds electrons and protons. It is a repulsive force. It is an attractive force. It binds protons and neutrons.

Which side of the electromagnetic spectrum has shorter waveiengths? $\square $ Which side of the electromagnetic spectrum has higher energy? $\square $ Which side of the electromagnetic spectrum has higher frequencies? $\square $ blue

Outdoors, shadows are longest at what time of day? Midnight Sunrise and sunset Noon 10 a.m.

Which of the following describe the expansion coefficients for a general state? $a_{n}=\langle \psi _{n}\vert \psi \rangle =\int _{-\infty }^{\infty }dx\psi _{n}^{\ast }(x)\psi (x)$ $a_{n}=(\sum _{n}\vert \psi _{n}\rangle )\vert \psi \rangle $ $a_{n}=\langle \psi _{n}\vert \psi \rangle ^{\ast }=\int _{-\infty }^{\infty }dx\psi _{n}(x)\psi ^{\ast }(x)$ $a_{n}=\langle \psi _{n}\vert \psi _{m}\rangle =\int _{-\infty }^{\infty }dx\psi _{n}^{\ast }(x)\psi _{m}(x)$

A certain wave function is given by $\psi (x)=\{ \begin{matrix} A&for-a\leqslant x\leqslant a\\ 0&otherwise\end{matrix} $ Which of the following corresponds to the Fourier transform for this wave function? A sum of spherical harmonics. A sum of sines and cosines. A sum of Hankel functions. The Dirac delta function.

8> What is the random capture theory? Which theory best explains how our solar system was created?

Match each statement to the wave interaction it describes. \begin{array}{|l|l|} \hline\ reflection\ &\ Waves\ bounce\ off\ an\ object.\ \\ \hline\ absorption\ &\ Waves\ are\ taken\ in\ by\ an\ object.\ \\ \hline\ transmission\ &\ Waves\ bend\ while\ passing\ from\ one\ medium\ to\ another.\ \\ \hline\ diffraction\ &\ Waves\ scatter\ through\ an\ opening\ or\ around\ an\ object.\ \\ \hline\ retraction\ &\ Waves\ go\ through\ an\ object.\ \\ \hline \end{array}

A wave function can be expanded in basis states as $\vert \psi \rangle =\sum _{n}a_{n}\vert \psi _{n}\rangle $ What must be true of the expansion coefficients? $\sum _{n}\vert a_{n}\vert ^{2}=1$ They must be real numbers. There is no restrictions on the coefficients. $\sum _{n}a_{n}=1$

Which of the following expressions correspond to the energy-time uncertainty principle? $\Delta E\Delta t\geqslant 2\bar {h}$ $\Delta E\Delta t\geqslant \hat {h}$ $\Delta E\Delta t\geqslant \frac {h}{2}$ $\Delta \omega \Delta t\geqslant \bar {h}$

Consider the following force: A fridge magnet is pulling on a paper clip. According to Newton's third law what other force must be happening? The paper clip is pushing on the fridge magnet. The paper clip is pulling on the fridge magnet.