4 years ago

What did it mean if something was in blue glass?

1 answer:

jolli1 [7]4 years ago

7 0

It mean COBALT GLASS, known as "smalt"

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As we know by the equation of mirror we have

$\frac{1}{d_i} + \frac{1}{d_o} = \frac{1}{f}$

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