A light has wavelength of is used in the double slits experiment . Which of the following values represent the phase difference between two waves interfere destructively at a point of the screen ?

The “death throes” of stars are amongst the most complex phenomena in all of astronomy, and the “corpses” of stars amongst the most energetic and exotic objects in existence. beginning at the end of the core helium fusion stage in a star’s life, describe in detail the post-main sequence development of both (a) a 1.0 solar mass star, and (b) a 25.0 solar mass star. in what significant ways do they differ? what role does each of these types of stars play in the "star-gas-star" cycle and the evolution of chemical elements in our galaxy?

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form

What practical value did astronomy offer to ancient civilizations?