*Question 214: Thin Convex Lens/Magnification A thin convex lens has focal length 20 cm. An object...

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$*Question 186: Refraction/Snells Law The index of refraction of water is 1.33. What is the angle of refraction of a beam of$

$*Question 197: Critical Angle A diamond (refractive index 2.46) is placed in water (refractive index 1.33). What is the criti$

Answer 1

Answer #1

Solution) (214) f = + 20 cm

u = 40 cm

m = ?

(1/f) = (1/u) + (1/v)

(1/v) = (1/f) - (1/u)

(1/v) = (1/20) - (1/40)

(1/v) = (20)/(20×40)

v = (20×40)/(20)

v = 40 cm

Magnification m = - (v/u) = - (40/40) = - 1

Option (b)

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Answer 2

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