Evaluate the power reflection of the etalon for a wavelength of 450 nm.
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- Sunlight is scattered by air molecules. Calculate the ratio of the scattered light intensity of blue color (400 nm) to that of red color (700 nm).A 2mW laser beams of wavelength λ = 6×10 cm is focussed on the retina by a human eye lens of focal length f = 2.5 cm and pupil diameter 2 mm. The intensity on the retina will be of the order of (a) 10¹ W/m² (b) 106W/m² (c) 108W/m² (d) 10²W/m²(A) Show a model as to how white light interacts with a t-shirt that appears to an observer as red and white striped in terms of light wave absoprtion and reflection. (B) Make a model of what will happen when white light is shined through a blue and green filter stacked on top of one another. It will appear black because white light is absorbed but show this in a skectch.
- A ray of blue light, randomly polarized, travelling in air (n=1.0) is incident on the surface of a transparent material (n = 1.6) at an angle of 45°. Calculate the ratio of intensities for reflected s- and p-polarized light, Is/Ip. (10)Red light of vacuum wavelength 650 nm is travelling in non-magnetic glass with refractiveindex nG = 1.50, then meets an interface with air at an angle of incidence of 75 degrees,and total internal reflection occurs.Calculate the tangential component of the wavevector kG in glass; state two conditionson the transmitted wavevector kA on the air side; and show that this leads to an evanescent wave with amplitude decaying exponentially away from the boundary. Calculate thedistance over which the E-field amplitude drops by a factor of 1/e...54 Dispersion in a window pane. In gle e Fig. 33-54, a beam of white light is incident at an- 50° on a common window pane (shown in cross section). For the pane's type of glass, the index of refraction for visible light ranges from 1.524 at the blue end of the spectrum to 1.509 at the red end. The two sides of the pane are paral- lel. What is the angular spread of the colors in the beam (a) when the light enters the pane and (b) when it emerges from the opposite side? (Hint: When you look at an object through a window pane, are the colors the light from the object dispersed as shown in, say, Fig. 33-20?) = Ꮎ Figure 33-54 Problem 54.