In a light interference pattern, alternate dark and bright fringes are seen. why are the bright fringes formed?

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system

Find an expression for the electric field e⃗ at the center of the semicircle. hint: a small piece of arc length δs spans a small angle δθ=δs /r, where r is the radius. express your answer in terms of the variables q, l, unit vectors i^, j^, and appropriate constants.

When doing scientific research ,the sources used should be ?