Trong một máy giao thoa Iâng, các khe được chiếu bởi ánh sáng đơn sắc có bước sóng   = 0,6 m. Khoảng cách giữa hai khi sáng =1mm . Khoảng cách từ mặt phẳng chứa
hai khi đến màn là D m =1 . Xác định vị trí của ba vân sáng đầu tiên (coi vân sáng chính
giữa là vân sáng thứ không)

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

From 0 to 5 seconds john pushed a box 5 meters. from 5 to 10 seconds, paul pushed the same box another 5 meters. who did more work? a. john b. paul c. john and paul did the same amount of work.

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?