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There is a crucial aspect of this unit that Im not understanding and that is how to find how many nodal or anti nodal lines are in the equation.

relevant formulas:

So if im looking for how many anti nodal lines exist I use the formula |

So lets say I have d and λ

d = 51cm and λ = 4

So we need to solve for n

1. Now on the board, the teacher will write the formula |

2. from there we get |

3. so |

4. then we get |

5.

6.

then you get the answer for n.

I just dont get at all how you get from 3. to 4. algebraically

i really need this cleared up. I need to understand how that works. I hope someone can explain it to me

thanks

relevant formulas:

So if im looking for how many anti nodal lines exist I use the formula |

**dsinθmax = n*λ**|So lets say I have d and λ

d = 51cm and λ = 4

So we need to solve for n

1. Now on the board, the teacher will write the formula |

**dsinθmax = n*λ**|2. from there we get |

**sinθmax = (n*λ) / d**| which cannot be greater than 1.3. so |

**(n*λ) / d ≤ 1**|4. then we get |

**n ≤ (d / λ)**|5.

**n = (51 / 4)**6.

**n = 12.75**then you get the answer for n.

I just dont get at all how you get from 3. to 4. algebraically

i really need this cleared up. I need to understand how that works. I hope someone can explain it to me

thanks

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