Assume the helium-neon lasers commonly used in student physics laboratories have power outputs of 0.250 mW. (a) If such a laser beam is projected onto a circular spot 3.00 mm in diameter, what is its intensity (in watts per meter squared)

35.4watts/m²

Explanation:

Given the power output of helium-neon laser = 0.250mW = 0.250×10^-3watts (1milliwatts = 10^-3watts

Diameter of the circular spot projected by laser beam = 3.00mm = 0.003m

Area of the circular spot = πd²/4

Area of the circular spot = π(0.003)²/4

= 7.069×10^-6m²

Intensity of the laser = power output/area

Intensity of laser = 0.250×10^-3Watts/7.069×10^-6m²

= 0.0354×10^-3+6

= 0.0354×10^3

Intensity of laser = 35.4watts/m²

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.

explanation:

considering the bohr theory, the type of connection that requires the transfer the answer conuldn't be right