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## GR0877 Problem 19

PROBLEM STATEMENT: This problem is still being typed.

SOLUTION: (A) According to Wien’s law $\lambda_1 T_1 = \lambda_2 T_2 = b$, from which $\lambda_2 = \lambda_1 T_1/T_2 = 500 \cdot 6000/300 = 10^4$ (nm) or 10 $\mu$m.

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