# Yahoo奇摩 網頁搜尋

1. ### Light speeds

The speed of light is different in different media...classical electromagnetic theory could be used to explain such phenomenon. James ... in electromagnetism into a set of 4 differential equations (now...

2. ### F.3 Physics 問題

...straight line called normal which is proportional to the plane mirror Then, we place a ray-box with a triple-slit plate on the paper and set a light at behind Then, switch on the light and observe how...

3. ### F.5 Physics power

1. Let R be the resistance of each light bulb, and r be the resistance of the resistor. Hence, voltage... of a bulb can be taken as more or less proportional to its power consumption. 3. The argument is only...

4. ### Reflection of Light (Waves)

(a) The distance from the camera to the image is 6m. So, the focus distance of the camera should be set at 6m. (b) No. As the infra-red beam is reflected by the plane mirror, the camera will detect the image distance as 3m.

This phenomenon is similar to the case of the sun during sun rise or sun set . During moon rise, the light from the moon has to travel thicker atmosphere than when it is high up at the sky. ...

6. ### alternative current

...there is marking on the side to see if the speed is correct, it only work under florecent light . Similarly, a whipping top...not flash) If you have a webcam, and set it as 60 frames per second...

7. ### physics lens 問題...

... on the focal plane. Third, you need to know parallel incident light rays fallen on a plane mirror result in...the laws of reflection. Now, consider the set -up. Light rays from a point of the object...

8. ### interference of light

... the reason why waves from light sources producing the...must be coherent. 2. The equation to calculate the position of fringes...could be produced is by setting sin(theta) = 1, m = a/入 Generally...

9. ### F4 Physics Young's double slit

...the equation: s = λD/a where s = fringe separation, λ = wavelength, D = slit- to -screen distance and a = slit separation we can deduce that λ in X is also...

10. ### F.4 physics

... are not equal, since the vertical component of the upper tension has to balance the vertical component of the lower tension and the weight of the bob. b...