CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

A convex lens of diameter 8.0 cm is used to focus a parallel bam of light of wavelength 620 nm. If the light be focused at a distance of 20 cm from the lens, what would be th eradius of the central bright spot formed?
 


Solution

λ=620nm=620×109m,D=20cm=20×102m,d=8cm=8×102mR=1.22×620×109×20×1028×102=1891×109=1.9×106m
So, Diameter =2R=3.8×106
 


Physics

Suggest Corrections
thumbs-up
 
0


similar_icon
Similar questions
View More


similar_icon
People also searched for
View More



footer-image