Comets and meteors are objects that are sometimes seen moving through the sky. Compare and contrast the different characteristics of these two types of objects. Comet Meteor Answer Bank

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What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th

Estimate of the number of stars in our galaxy