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Sun subtends an angle of 0.5 degree at the pole of a concave mirror of radius of curvature 15 m. The diameter of the image of thes sun formed by the mirror is..?
plz ans fast !

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3.7 m ?
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See , in this case ,

u = ∞ , Let x be the diameter ,

using mirror formula ,

1/u + 1/v = 1/f

v = f ,

let ∆ be the angle ,

∆ = x/f

x = ∆f ,

Multiply these two u will get diameter , or u can chamge your angle to radian ,
  • -3
oo thankuu mickey :P ^_^
  • -5
^_^ mah pleasure
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:')
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