in a signle slit diffraction experiment the width of the lsit is made double the original width how does this affect
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The size of the central maximum is given by 2λa2λawhere a is the slit width.
It is clear if a is doubled, size of the central maximum is halved. However the intensity changes because of two factors.
One, doubling the width of the slit causes twice the light energy fall on the screen as compared to that with the original width.
Two, the light energy is now squeezed into half of the area on the screen because the size of the central maximum is halved.
The two factors make the intensity four times
It is clear if a is doubled, size of the central maximum is halved. However the intensity changes because of two factors.
One, doubling the width of the slit causes twice the light energy fall on the screen as compared to that with the original width.
Two, the light energy is now squeezed into half of the area on the screen because the size of the central maximum is halved.
The two factors make the intensity four times
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