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  1. ...guess you are asking a monochromatic light is incident normally on that thin film. When we treat this problem, we need to consider the path difference(pd) of...

  2. ... light rays, including those reflected by thin films. Perhaps you have wondered why parallel reflected...

  3. Thin lens(urgent) 1.A plano-convex lens having a focal length of 250mm ...

  4. ... talking about destructive interference by reflection at the top and bottom of the thin film. In applying the equation: 2.n.t = (m+1/2)入 the wavelength of...

  5. Two converging lenses having focal lengths of 30 mm and 40 mm. The two lenses are placed 20 mm apart. An object is placed 40 mm in front of the first lens. Determine the position of the image by...

  6. 1, 2) As the angle is measured in radians, A and B should have units of rad/s2 and rad/s4 resp. 3) Radius of the sphere = 23.5 cm = 0.235 m So moment of inertia = 11 x 0.2352 = 0.6075 kg/m2 And the instantaneous angular speed is d(At2...

  7. In a physics textbook, the light rays are usually drawn farther apart just for reason of clarity. In fact, the light rays are very close to each other ( a light beam can be regarded to consist of infinite number of light rays...

  8. 1. Using 2nt = (m-0.5)λ for constructive interference to occur at the reflected ray. where n is the refractive index of the film t is its thickness λ is the wavelength of the incident light m is an integer hence, λ = 2nt/(m-0.5) = 2 x 1.33 x 320/(m-0.5) The...

  9. When light travels in a film, there bound to be absorption taken place, and the light intensity would decrease. If the film is thick, light reflected at the bottom of the film would decrease in intensity substantially because the light needs to pass through twice the thickness...

  10. ...increase of CO2 density would enhance greenhouse effect. Q: How the thinning of ozone layer affects the environment? Ozone could absorb ultraviolet radiation...