The monochromatic light diffracts on the two slits which are 0.1 mm apart (their size is negligible) andproduces an interference pattern on the wall which is 3 m far from the apparatus. a) The distance between the central bright fringe and the first off-center bright fringe is 2 cm. Whatis the wavelength of the light? Which color is it?b) How many bright fringes could we see on the wall?c) We change the film with slits and the distance between adjacent dark fringe and bright fringe is7 mm. What is the distance between two slits now?

Answer:   [a]:   "slate" .

Answerthe energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.explanationwe define electric potential as the ratio electric potential energy to the charge,    then the following gives us the potential difference,      the formula  may be on your formula sheet.the change in electric potential energy would be the energy that would needed to move it from point a to point b. solving for that, we get    using q = 8.00  × 10⁻¹⁹ c and  δv = 2.00 v, we get    the energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.