What major contribution did chadwick towards the development of the atom?

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

In positive numbers less than 1, the zeros between the decimal point and non zero are significant

J. j. thomson’s experiment disproved the theory that an atom