Two slits spaced 0.240 mm apart are 0.970 m from a screen and illuminated by coherent light of wavelength 620 nm. The intensity at the center of the central maximum (0 = 0°) is Io. Part A What is the distance on the screen from the center of the central maximum to the first minimum? Express your answer with the appropriate units. y = Value Ĉ Part B Units Submit Previous Answers Request Answer SHC X Incorrect; Try Again; 5 attempts remaining ? PC ? What is the distance on the screen from the center of the central maximum to the point where the intensity has fallen to fo/2? Express your answer with the appropriate units.

The figure(Figure 1) shows the interference pattern on a screen 1.0 m behind an 970 line/mm diffraction grating. Figure Intensity H 89.7 cm / H 89.7 cm 43.6 cm 43.6 cm 1 of 1 Part A What is the wavelength of the light? Express your answer to two significant figures and include the appropriate units. λ = Submit O μA Value Provide Feedback Request Answer Units .... ?

Light of wavelength 690 nm falls on two slits and produces an interference pattern in which the fourth-order fringe is 37 mm from the central fringe on a screen 2.5 m away. Part A What is the separation of the two slits? Express your answer using two significant figures. ΑΣΦ d=270 10 6 = ? Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining m

A bowl of water (n = 1.33) has a thin layer of grease (n = 1.60) floating on top of the water. When you illuminate the grease from above with monochromatic light, you get constructive reflection if the wavelength in air is 565 nm. Find the smallest possible thickness of the grease layer. Express your answer with the appropriate units. tmin = 8.83x10-8 m Submit Previous Answers Correct Correct answer is shown. Your answer 88.28 nm(=8.828x10-8 m) was either rounded differently or used a different number of significant figures than required for this part. Part H Find the second smallest possible thickness. Express your answer with the appropriate units. HA ? t2 = Value nm