6 A student eats a dinner containing 8.ox 10bg lor 아 energy. He wishes to do an equivalent amount of work in a near by gym by lifting la Gokg object to expand this much tonergy? Assume that he raises it a distance of 2.om Rach time. ​

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.

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

What are the applications of electromagnetic waves