Use the figure for the next two questions.
-The interference pattern is from a spherical lens placed on a flat reflecting surface using a monochromatic light of wavelength $\lambda$ = 550 nm.If the distance from the center to A is 0.6 mm,the radius of curvature of the lens is
A)41.3 cm
B)82.5 cm
C)18.7 cm
D)37.4 cm
E)26.2 cm

Question

Use the figure for the next two questions. 
-The interference pattern is from a spherical lens placed on a flat reflecting surface using a monochromatic light of wavelength $\lambda$ = 550 nm.If the distance from the center to A is 0.6 mm,the radius of curvature of the lens is
A)41.3 cm 
B)82.5 cm 
C)18.7 cm 
D)37.4 cm 
E)26.2 cm

Quizplus · Accepted Answer

The radius of curvature (R) of the lens can be calculated using the formula for Newton's rings: R = (r^2 * λ) / (2 * t), where r is the radius of the ring, λ is the wavelength, and t is the thickness of the air film (which is approximately zero for the center). For the first dark ring, t = λ/2, so R = (0.6 mm)^2 * 550 nm / (2 * 550 nm) = 37.4 cm.

Use the Figure for the Next Two Questions λ\lambdaλ = 550 NmIf the Distance from the Center to a Is 0

Use the Figure for the Next Two Questions $\lambda$ = 550 NmIf the Distance from the Center to a Is 0