Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test Physics Optics Interference

The two light rays will undergo interference phenomenon only when-

1

The source of two light rays must be coherent

2

The rays must be of single wavelength

3

Both 1 and 2 are wrong

4

More than one of the above

5

None of the above

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