14) sinα=n*sinβ=√3*(1/2)=√3/2
α=60° (Г)
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15) F= - 15 с
f/d=1/2 f=d/2
- 1/F=1/d - 1/f=1/d -2/d= - 1/d
- 1/15= - 1/d
d=15 см (Б)
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14) sinα=n*sinβ=√3*(1/2)=√3/2
α=60° (Г)
=============
15) F= - 15 с
f/d=1/2 f=d/2
- 1/F=1/d - 1/f=1/d -2/d= - 1/d
- 1/15= - 1/d
d=15 см (Б)
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