Answer:
tan 249 = 2.61
tan 249 = tan (249 - 180) = tan 69 = 2.61
Answer:
extrusive I'm pretty sure that's right
Answer:
You didn't give the information needed for the answer bud
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Answer:
i don't know if this helps but The refractive index of the material of the prism of an angle 60 degree is 1.62 for sodium light. there you go hope it helps
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