light is passing through a diffraction grating with the slits separated by 0.01

Question

light is passing through a diffraction grating with the slits separated by 0.01 mm. the light is of wavelength 750 nm and the interference pattern is projected onto a screen 10 m from the diffraction grating. what is the angle that corresponds to the first (m=1) bright spots on either side of the central (m=0) bright spot? How far is the m=0 from m=1 on the wall? light is passing through a diffraction grating with the slits separated by 0.01 mm. the light is of wavelength 750 nm and the interference pattern is projected onto a screen 10 m from the diffraction grating. what is the angle that corresponds to the first (m=1) bright spots on either side of the central (m=0) bright spot? How far is the m=0 from m=1 on the wall? light is passing through a diffraction grating with the slits separated by 0.01 mm. the light is of wavelength 750 nm and the interference pattern is projected onto a screen 10 m from the diffraction grating. what is the angle that corresponds to the first (m=1) bright spots on either side of the central (m=0) bright spot? How far is the m=0 from m=1 on the wall?

Explanation / Answer

d = 0.01 mm, lamda = 750 nm , D = 10 m

for bright spot

dsin(theta) =m*lamda

theta = arcsin(m*lamda/d)

theta = arcsin(1*750*10^-9/(0.01*0.001))

theta = 4.3 degrees

y= m*lamda*D/d

y = 1*750*10^-9*10/(0.01*0.001)

y = 0.75 m

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