Question

Calculate "d" using the following equation: d = (m*lamda)/sintheta. d = distance between lines on grating,...

Calculate "d" using the following equation: d = (m*lamda)/sintheta. d = distance between lines on grating, m = Order of diffraction, lambda = wavelength converted to metres) and theta = angle of deviation.

Lambda 1 = 589.0mm and lambda 2 = 589.6mm (use the average value of 589.3mm)

Data

Sodium light, central position = 180°-0’

Colour

Right θ (° ')

Left θ (° ')

Yellow

190°-1’

170°-5’

Hydrogen light, central position = 180°-0’

Colour

Right θ (° or ° ')

Left θ (° or ° ')

Violet

187°-29’

172°-41’

Blue

188°-24’

171°-51’

Blue Green

---------------

---------------

Red

191°-22’

168°-26’
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