Question

(e) (4 points) When you shine a laser beam on a CD at an angle, you would obtain a string of diffracted spots. Looking at the illustration below, what quantity could you measure from the diffraction spots: (1) The height of the track (step), or (2) The width of the track (step), or (3) Both, or (4) None of the above. Outgoing laser light; They have constructive Interference, that causes Diffraction spots Incoming laser light Groves on a CD Cross section of the groves (f) (5 points) Can you sketch the diffraction pattern for Pt when it melts into liquid? Remember that liquid has no crystal structure. Bonus question (5 points): The relation between the wavelength $\lambda$ and the energy E of a wave is given by $\lambda$ =hc/E, where h = Plank's constant = 6.626 x 10$^{-34}$ Js, c = speed of light = 3*10$^8$ m/s, and $\lambda$ the wavelength. From this relation, could you figure out how larger the energy is for the ultraviolet light versus the visible light?

          (e) (4 points) When you shine a laser beam on a CD at an angle, you
would obtain a string of diffracted spots. Looking at the illustration below,
what quantity could you measure from the diffraction spots:
(1) The height of the track (step), or
(2) The width of the track (step), or
(3) Both, or
(4) None of the above.
Outgoing laser light;
They have constructive
Interference, that causes
Diffraction spots
Incoming laser light
Groves on a CD
Cross section of the groves
(f) (5 points) Can you sketch the diffraction pattern for Pt when it melts into
liquid? Remember that liquid has no crystal structure.
Bonus question (5 points):
The relation between the wavelength $\lambda$ and the energy E of a wave is given by
$\lambda$ =h*c/E,
where h = Plank's constant = 6.626 x 10$^{-34}$ J*s, c = speed of light = 3*10$^8$ m/s,
and $\lambda$ the wavelength. From this relation, could you figure out how larger the
energy is for the ultraviolet light versus the visible light?

$(e) (4 points) When you shine a laser beam on a CD at an angle, you would obtain a string of diffracted spots. Looking at the illustration below, what quantity could you measure from the diffraction spots: (1) The height of the track (step), or (2) The width of the track (step), or (3) Both, or (4) None of the above. Outgoing laser light; They have constructive Interference, that causes Diffraction spots Incoming laser light Groves on a CD Cross section of the groves (f) (5 points) Can you sketch the diffraction pattern for Pt when it melts into liquid? Remember that liquid has no crystal structure. Bonus question (5 points): The relation between the wavelength λ and the energy E of a wave is given by λ =h*c/E, where h = Plank's constant = 6.626 x 10^-34 J*s, c = speed of light = 3*10^8 m/s, and λ the wavelength. From this relation, could you figure out how larger the energy is for the ultraviolet light versus the visible light?$

Added by Richard H.

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