A person places a divergent lens between their eyes and a fruit, and sees a virtual image of that fruit. Considering the distances indicated in the figure and that the lens is Gaussian, the focal length of this lens is  * 

–2.4 m.

–2.0 m.

–2.1 m.

–2.7 m.​

The extremely high temperatures needed to trigger nuclear fusion are proposed to be generated by laser irradiating a spherical pellet of deuterium and tritium fuel of diameter 1.8 mm. (a) determine the maximum fuel temperature that can be achieved by irradiating the pellet with 200 lasers, each producing a power of 550 w. the pellet has an absorptivity 0.3 and emissivity 0.8.

What happens to light waves from a star as the star moves away from earth?

If a stone with an original velocity of 0 is falling from a ledgeand takes 8 seconds to hoybthe ground whays the final velocity of the stone