Answer: Option (A) is the correct answer.
Explanation:
One of the equation for diffraction grating is as follows.
[tex]dsin \theta = m \lambda[/tex]
or, [tex]sin \theta = \frac{m \lambda}{d}[/tex]
And, for greater value of [tex]Sin \theta[/tex] the spacing gets wider.
Hence, in order to increase [tex]Sin \theta[/tex], the wavelength would have to increase or spacing has to decrease.
Thus, we can conclude that increase the wavelength of the light changes would increase the separation between the bright fringes in the diffraction pattern formed by diffraction grating.
The increase in the separation between the bright fringes in the diffraction pattern formed by diffraction grating occurs when there is increase in the wavelength of the light.
The equation for diffraction grating that relates the wavelength and separation of bright fringes is given as;
[tex]d sin\theta = m \lambda \\\\sin \ \theta = \frac{m \lambda}{d}[/tex]
where;
Thus, we can conclude that the increase in the separation between the bright fringes in the diffraction pattern formed by diffraction grating occurs when there is increase in the wavelength of the light.
Learn more here:https://brainly.com/question/15443536
