(a) θ_i = 54.2˚, θ_r = 90˚, Φ = 51.9˚

Wavelength/nm

Experimental value/sr⁻¹

Predicted value/sr⁻¹

Error/%

1024

0.541189

0.546841512

1.04%

1124

0.549404

0.544266263

0.94%

1224

0.513433

0.49283233

4.01%

1324

0.485981

0.455994278

6.17%

1424

0.429555

0.376529352

12.34%

1524

0.4415

0.394986254

10.55%

1624

0.425466

0.38912603

8.53%

(b) θ_i = 54.2˚, θ_r = 90˚, Φ = 40.9˚

1024

0.562787

0.574227394

2.03%

1124

0.552012

0.570903122

3.42%

1224

0.558895

0.52370727

6.30%

1324

0.509832

0.484988318

4.87%

1424

0.457398

0.443700813

2.99%

1524

0.442066

0.426678165

3.48%

1624

0.405154

0.405772607

0.15%

(c) θ_i = 49.2˚, θ_r = 90˚, Φ = 96.3˚

1024

0.485134

0.504831738

4.06%

1124

0.479922

0.507027682

5.65%

1224

0.503343

0.489291979

2.79%

1324

0.486239

0.474720778

2.37%

1424

0.423246

0.379880553

10.25%

1524

0.494161

0.420065487

14.99%

1624

0.471158

0.394506385

16.27%