Fringe-width is defined as the sepration between two consecutive dark or bright fringes on the screen.
Fringe width is a term used for the width of the first maxima in diffraction. It can also be found by calculation by dividing the wavelength of the light input multiplied by the distance between the slits and the screen by the space between the slits.
PGA states average width of a green fringe is 30 inches
decreases
The expression is L - 3.
The angular fringe width in Newton's rings is given by the equation δθ = λ / R, where δθ is the angular fringe width, λ is the wavelength of light, and R is the radius of curvature of the lens or mirror producing the rings. It represents the distance between adjacent bright or dark fringes in the pattern.
Fringe width (for dark and bright bands): D * wavelength / d where, D = distance between screen and coherent sources (metres), wavelength = wavelength of light used is experiment (nanometres), d = distance between the 2 coherent sources (millimetres).
Area=Length X Width
call width x so length is 3x perimeter is (2*length)+(2*width) so perimeter is 8x
1. Find out how the strength of the beam depends on its height, and on its width. 2. Derive the corresponding expression that relates the strength of the beam to one of the variables, for example its width. 3. Use calculus to maximize this expression. That basically means taking the derivative of the expression in step 2., then equating it to zero.
Need more context
y,x