Ascientist directs monochromatic light toward a single slit in an opaque barrier. the light has a wavelength of 580 nm and the slit is 0.215 mm wide. the light that passes through the slit creates a diffraction pattern on a screen, which is 1.80 m from the slit. (a) how wide (in mm) is the central maximum (the central, bright fringe), as measured on the screen? mm
(b) how wide (in mm) is either of the two first-order bright fringes, as measured on the screen? mm

a) 9.72 mm

b) 4.86 mm

Explanation:

wave length of light  λ is  580 nm = 580 \times 10⁻⁹ m

Width of slit d = 0.215\times 10⁻³ m

Distance of screen D  = 1.8 m.

Width of one fringe =

Putting the values we get fringe width

=

=4.86 mm.

a) Width of central maxima = 2 times width of one fringe

= 2 times 4.86

=9.72 mm

b) width of each fringe except central fringe  is same , no matter what the order is.Only brightness changes .

So width of either of the two first order bright fringe will be same and it will be  

= 4.86 mm.

are you like autistic or something?

xd

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.