What is the effect of increasing the wavelength of light in a double-slit experi

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Question: What is the effect of increasing the wavelength of light in a double-slit experiment?

Options:

Correct Answer: Fringe width increases

Solution:

Increasing the wavelength (λ) increases the fringe width (β), as β is directly proportional to λ.

What is the effect of increasing the wavelength of light in a double-slit experiment?

What is the effect of increasing the wavelength of light in a double-slit experiment?

Correct Answer: Fringe width increases.

Step 1: Understand what a double-slit experiment is. It involves shining light through two narrow slits to create an interference pattern on a screen.
Step 2: Know that the interference pattern consists of bright and dark fringes (lines) on the screen.
Step 3: Learn that the distance between these bright fringes is called fringe width (β).
Step 4: Recognize that fringe width (β) is affected by the wavelength (λ) of the light used in the experiment.
Step 5: Realize that increasing the wavelength (λ) means the light waves are longer.
Step 6: Understand that when the wavelength increases, the fringe width (β) also increases.
Step 7: Conclude that a larger wavelength results in a wider spacing between the bright fringes on the screen.

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