𝐍 = 𝟓𝟎𝐇𝐳
𝐍′ = 𝟐𝑵
𝐍 = 𝟓𝟎𝐇𝐳
𝐚 = 𝟒𝐦𝐦
𝐚 = 𝟏𝟎𝐦𝐦
L=7,5cm ; D=3m ; =623,8nm
2.