How do you find displacement

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 are similarities and differences between refraction, reflection, diffraction and absorption?

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?