A biconvex lens of focal length f forms a circular image of sun of radius r in focal plane. Then(A)?r2 œ f(B)?r2 œ f2(C)if lower half part is covered by black sheet, then area of the image is equal to ?r2/2(D)if f is doubles, intensity will increaseplease clearify!!!!!!A biconvex lens of focal length f forms a circular image of sun of radius r in focal plane. Then(A)?r2 œ f(B)?r2 œ f2(C)if lower half part is covered by black sheet, then area of the image is equal to ?r2/2(D)if f is doubles, intensity will increaseA biconvex lens of focal length f forms a circular image of sun of radius r in focal plane. Then(A)?r2 œ f(B)?r2 œ f2(C)if lower half part is covered by black sheet, then area of the image is equal to ?r2/2(D)if f is doubles, intensity will increaseA biconvex lens of focal length f forms a circular image of sun of radius r in focal plane. Then(A)?r2 œ f(B)?r2 œ f2(C)if lower half part is covered by black sheet, then area of the image is equal to ?r2/2(D)if f is doubles, intensity will increase

Rahbar Ahmad , 14 Years ago

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