28. Monochromatic light coming from the left passes through a slit S and then falls on a metal sheet with two slits B and C as shown below. The slits are the same width. The light then falls on a screen. 5.0 m с -10.0 The intensity pattern shown below is centered at P. 0 3 Distance (cm) The wavelength of the light is closest to (a) 1.5 x 105 cm (b) 4.5 x 105 cm (c) 5.0 x 105 cm (d) 7.5 x 105 cm (e) 15 x 105 cm

6. Structures on a hummingbird feather act like a diffraction grating having 8000 lines per centimeter. What is the angle of the first-order maximum for 488-nm light? 2 7. When red light illuminates a grating with 7000 lines per centimeter, its second maximum is at 62.4°. What is the wavelength of this light?

6. A beam of light traveling in air has a wavelength of 475 nm. If the light illuminates a diffraction grating with 3000 lines/cm, what is the angle of the second-order bright spot produced? f19 0 oof19

When polychromatic visible light shines through a diffraction grating, the colors seen closest to the central maximum will: A. be visible as the lowest wavelength in the mixture B. be visible as the highest wavelength in the mixture C. be a mixture of the wavelengths present D. Always be white

5. Draw the variation of the mean light intensity (l) with respect to the angle of diffraction (teta) if i is due to interference of light of wavelength (lamda) using 2 slits.  It is known that each slit has a width of a(- 2 lamda) and the distance between the two slits is d(- 4 lamda).

3. In a double slit experiment, the distance between the slits is d=1 mm. A screen is situated at a distance of 2.5 m from the slits. Point P is at a distance of 25 cm from O', as in Figure. O' is the orthogonal projection of the center between the slits (0) on the screen. Monochromatic light with frequency v= 550 THz is used in this experiment. (a) Calculate the intensity of light at point P. (b) Calculate the angle ZP00'. (c) Calculate the location of the first three maxima with respect to point O'. (d) Calculate the location of the first three minima with respect to point O'. BONUS: You now consider that each slit has width a =0.05 mm. Calculate the intensity of light at point P. P.

10. Please refer to the  Figure  which shows the pattern of interference fringes for light of wavelength 609 nm passing through two narrow slits, projected onto a screen a distance of 2.27 m away. The distance on the screen between the centers of two adjacent bright fringes is 1.42 cm. What is the distance between the two slits?     7.79E-05 m   9.74E-05 m   1.75E-04 m   1.27E-04 m