Thin film reflected constructive (normal incidence checklist) (2μt = nλ (check π phase jumps))
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2μt = nλ (check π phase jumps)
What each symbol means
| Symbol | What it stands for |
|---|---|
| n | Order integer for constructive/destructive condition (problem-specific) |
| t | Thickness of thin film (m) |
| \mu | Refractive index of film (or relative index as stated) |
| \lambda | Wavelength in vacuum or as specified in problem (m) |
When to use this
Standard JEE / NCERT assumptions unless stated (paraxial, thin lens, coherent YDSE sources, etc.).