A parallel beam of light falls successively on a thin convex lens of focal length \( 40 \mathrm{...

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A parallel beam of light
falls successively on a thin convex lens of focal length \( 40 \mathrm{~cm} \) and then on a thin convex lens of focal length \( 10 \mathrm{~cm} \) as shown in the following figure. In another case the second lens is an equi-concave lens of focal length \( 10 \mathrm{~cm} \) and made of material of refractive index 1.5. In both the cases, the second lens has an aperture equal to \( 1 \mathrm{~cm} \).
Compare the area illuminated by the beam of light on the screen, which passes through the second lens in the two cases. The ratio \( \left(A_{2} / A_{1}\right) \) will be
(A) 72
(B) 81
(C) 56
(D) 29
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