A $4\mathrm{.}5-$cmcm$-$wide diffraction grating has $2500$ slits. It is illuminated by light of wavelength $600$ nmnm$.$

Part A

What is the angle $($in degrees$)$ of the first diffraction order? $$

Express your answer in degrees.

View Available Hint$($s$)$for Part A

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$1$$1=$

nothing

$$

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Part B

What is the angle $($in degrees$)$ of the second diffraction order?