Предмет: Физика, автор: temerep

Кут між головними площинами поляризатора і аналізатора φ₁ = 45°. У скільки разів зменшиться інтенсивність світла, яке виходить з аналізатора, якщо кут збільшиться на Δφ = 15°

Ответы

Автор ответа: DedStar
1

Ответ:

Объяснение:

Угол между главными плоскостями поляризатора и анализатора φ₁ = 45°. Во сколько раз уменьшится интенсивность света, выходящего из анализатора, если угол увеличится на Δφ = 15°

Дано:

φ₁ = 45°

Δφ = 15°

________

I₁ / I₂ - ?

По закону Малюса:

I₁ = I₀·cos² φ₁

I₂ = I₀·cos² φ₂

Найдем отношение:

I₁ / I₂ = (cos φ₁ / cos φ₂)²

I₁ / I₂ = (cos φ₁ / cos (φ₁ +Δφ) )²

I₁ / I₂ = (cos 45° / cos (45° + 15°))²

I₁ / I₂ = (cos 45° / cos 60°)²

I₁ / I₂ = ((√2/2)  / (1/2))² = (√(2))² = 2

Интенсивность уменьшилась в 2 раза.

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