Question

Using the hydrogen light : central position = 180? 2'

colour øright øleft

violet 187?24' 172?35'

blue 188?23' 171?40'

blue green missing missing

red 191?21' 168?49'

Calculate the average angle for each spectral line.

Compute the wavelength of each spectral line using the equation ?= d sin ø/ m

Answer 1

given, central position 180 deg 2min

central position = 180 + 2/60 deg = 180.06667 deg

now, for violet color
average deflection = [(180.06667 - (175 + 35/60)) + (187 + 24/60 - 180.06667)]/2
avg deflection = 5.908333333 deg

now, for blue color
average deflection = [(180.06667 - (171 + 40/60)) + (188 + 23/60 - 180.06667)]/2
avg deflection = 8.3583333 deg

now, for red color
average deflection = [(180.06667 - (168 + 49/60 )) + (191 + 21/60- 180.06667)]/2
avg deflection = 11.266666 deg