Вопрос
A3. Natural light (I_(cats)) is incident on a system of crossed polaroids.The intensity of light leaving the system is equal to __ 1. (}_{2)^1I_(ecr) 2.0 3. 2I_(infty ) 4. I_((ows)) A4. When an electron of a hy drogen atom transitions from the fourth orbital to the first orbital . its potential energy __ 1. quadruples 2. decreases by a factor of 16 3. increases by a factor of 16 4. only the total energy changes
Решения
4.3
(255 Голоса)
Устина
элита · Репетитор 8 лет
Ответ
3. The correct answer is 2. 0.When natural light is incident on a system of crossed polaroids, the intensity of light leaving the system is zero. This is because the crossed polaroids are oriented perpendicular to each other, which means that the light passing through the first polaroid is blocked by the second polaroid. As a result, no light is transmitted through the system, and the intensity of the light leaving the system is zero.A4. The correct answer is 2. decreases by a factor of 16.When an electron of a hydrogen atom transitions from the fourth orbital to the first orbital, its potential energy decreases by a factor of 16. This is because the potential energy of an electron in an atom is inversely proportional to the square of the distance between the electron and the nucleus. As the electron moves closer to the nucleus, the distance between them decreases, and the potential energy becomes more negative. In this case, the electron is moving from the fourth orbital (which is farther from the nucleus) to the first orbital (which is closer to the nucleus), so the potential energy decreases by a factor of 16.