Predict/Calculate Newton s Rings Monochromatic light with λ = 648 nm shines down on a plane-convex lens lying on a piece of plate glass as shown in Figure 28-47 . When viewing from above one sees a set of concentric dark and bright fringes referred to as Newton’s rings (See Figure 28-13 (b) for a photo of Newton’s rings.) (a) If the radius of the twelfth dark ring from the center is measured to be 1.56 cm, what is the radius of curvature R , of the lens? (b) If light with a longer wavelength is used with this system, will the radius of the twelfth dark ring be greater than or less than 1.56 cm? Explain.
Predict/Calculate Newton s Rings Monochromatic light with λ = 648 nm shines down on a plane-convex lens lying on a piece of plate glass as shown in Figure 28-47 . When viewing from above one sees a set of concentric dark and bright fringes referred to as Newton’s rings (See Figure 28-13 (b) for a photo of Newton’s rings.) (a) If the radius of the twelfth dark ring from the center is measured to be 1.56 cm, what is the radius of curvature R , of the lens? (b) If light with a longer wavelength is used with this system, will the radius of the twelfth dark ring be greater than or less than 1.56 cm? Explain.
Predict/Calculate Newton s Rings Monochromatic light with λ = 648 nm shines down on a plane-convex lens lying on a piece of plate glass as shown in Figure 28-47. When viewing from above one sees a set of concentric dark and bright fringes referred to as Newton’s rings (See Figure 28-13 (b) for a photo of Newton’s rings.) (a) If the radius of the twelfth dark ring from the center is measured to be 1.56 cm, what is the radius of curvature R, of the lens? (b) If light with a longer wavelength is used with this system, will the radius of the twelfth dark ring be greater than or less than 1.56 cm? Explain.
How can you tell which vowel is being produced here ( “ee,” “ah,” or “oo”)? Also, how would you be able to tell for the other vowels?
You want to fabricate a soft microfluidic chip like the one below. How would you go about
fabricating this chip knowing that you are targeting a channel with a square cross-sectional
profile of 200 μm by 200 μm. What materials and steps would you use and why? Disregard the
process to form the inlet and outlet.
Square Cross Section
1. What are the key steps involved in the fabrication of a semiconductor device.
2. You are hired by a chip manufacturing company, and you are asked to prepare a silicon wafer
with the pattern below. Describe the process you would use.
High Aspect
Ratio
Trenches
Undoped Si Wafer
P-doped Si
3. You would like to deposit material within a high aspect ratio trench. What approach would you
use and why?
4. A person is setting up a small clean room space to carry out an outreach activity to educate high
school students about patterning using photolithography. They obtained a positive photoresist, a
used spin coater, a high energy light lamp for exposure and ordered a plastic transparency mask
with a pattern on it to reduce cost. Upon trying this set up multiple times they find that the full
resist gets developed, and they are unable to transfer the pattern onto the resist. Help them
troubleshoot and find out why pattern of transfer has not been successful.
5. You are given a composite…
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
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Diffraction of light animation best to understand class 12 physics; Author: PTAS: Physics Tomorrow Ambition School;https://www.youtube.com/watch?v=aYkd_xSvaxE;License: Standard YouTube License, CC-BY