An 18 mm wide diffraction grating has rulings of 820 lines per mm. light is incident normally on the grating. monochromatic light of 446 nm wavelength is used. the largest angle from the normal at which an intensity maximum is formed is closest to:

a. 43°
b. 47°
c. 41°
d. 39°
e. 45°

Iwill give brainliest if you answer right : )

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below. your friend goes first, and you follow after he has dropped a distance of 2.0m. when your friend hits the water, is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

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