Focal length of concave mirror is always positive always negative zero Focal len
ID: 1566689 • Letter: F
Question
Focal length of concave mirror is always positive always negative zero Focal length of convex mirror is always positive always negative zero Focal length of diverging lens is always positive always negative zero Focal length of converging lens is always positive always negative zero Two monochromatic sources must have same wave length(lambda), frequency (f), and amplitude (A) to produce interference pattern. TRUE FALSE. Intensity of wave is propertional to the square of amplitude (A). TRUE FALSE. Interference patterns are equally spaced where as diffraction patterns are not equally spaced. TRUE FALSE. If wavelength of light is increased, width of bright or dark fring decreases. TRUE FALSE. In interference, light from two source interact; whereas in diffraction light from two parts of a same source interact. TRUE FALSE.Explanation / Answer
9) always positive
10) always negative
11) always negative
12) always positive
13) TRUE
14) True
15) Ture
16) False
17) False