Question

16. A Young's double slit has a slit separation of 2.50 x 10 m on which a monochromatic light beam is directed. The resultant bright fringes on a screen 1.00 m from the double slit are separated by 2.30 x 10 m. What is the wavelength of this beam?(1 nm-10 m) a. 373 nm b, 454 nm 575 nm d. 667 nm 17. What is the minimum thickness of a glycerin film (n 1.47) on which light of wavelength 600 nm shines that results in constructive interference of the reflected light? Assume the film is surrounded front and back by air. a. 75nm b. 102 nm c. 150 m d. 204 nm 18. Light of wavelength 540 nm is incident on a slit of width 0.150 mm, and a diffraction pattern is produced on a screen that is 2.00 m from the slit. What is the width of the central bright fringe? (1 nm -10*m a. 0.720 em . 1.44 cm c. 1.76 cm d. 2.16 cm 19. A given individual is unable to see objects clearly when they are beyond 100 cm. What focal length lens should be used to correct this problem? a.-100 cm b. -33.3 cm c.-20 cm d. 75 cm 20. A 1.5-m tall woman stands 5.0-m in front of a camera with a 4.0-cm focal length lens. What is the size of the image formed on film? a. 2.4 cm b. 1.9 cm c. 1.2 cm d. 0.60cm

Answer 1