Which of the following statements are true? Constructive interference occurs bet

Question

Which of the following statements are true?

Constructive interference occurs between two waves which are 180 degrees out of phase.In a double slit experiment, if the physical path length differs by one wavelength, destructive interference occurs.
Two paths which have the same physical length also have the same optical path length.
"Coherent light" means that all waves have the same wavelength and phase.

Diffraction gratings always have a zeroth-order maximum in the middle of the pattern.
The finer the grating, the further apart the maxima.
The interference pattern of a diffraction grating is oriented parallel to the slits.
Diffraction gratings can be used to determine the wavelength of light

Explanation / Answer

Constructive interference occurs between two waves which are 180 degrees out of phase----------------false

In a double slit experiment, if the physical path length differs by one wavelength, destructive interference occurs.----false

Two paths which have the same physical length also have the same optical path length.------------flase

"Coherent light" means that all waves have the same wavelength and phase.-------------true

Diffraction gratings always have a zeroth-order maximum in the middle of the pattern.------true

The finer the grating, the further apart the maxima.------true

The interference pattern of a diffraction grating is oriented parallel to the slits.------------flase

Diffraction gratings can be used to determine the wavelength of light--------true

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