plz no references, just type something by yourself

https://www.khanacademy.org/humanities/monarchy-enlightenment/neo-classicism/v/david-marat (Links to an external site.)
1) How is this painting revolutionary in content and form?
2) Which ideals of the Enlightenment are echoed in this painting?

 
https://www.khanacademy.org/humanities/becoming-modern/Victorian-art-architecture/pre-raphaelites/v/sir-john-everett-millais-ophelia-1851-52 (Links to an external site.)
1) What is Millais rejecting in this painting? What sorts of things does he have to overcome in painting this work?
2) Why are the Pre-Raphaelites considered radical in the Victorian era?