Question

at what distance should an object be placed in front of a concave mirror of focal length 50 cm so that an image of triple of sizes form​

Answer 1

Answer:

7 5 c m

Explanation:

Given : At what distance should an object be placed in front of a concave mirror of focal length 5 0 c m so that an image of triple of sizes form​

To find : At what distance should an object be placed in front of a concave mirror of focal length 5 0 c m so that an image of triple of sizes form​

Focal length , f = 50 cm

Magnification, m = 2

m = V / u 2

v = 2u

From mirror formula,

1 / f =  1 / v +  1 / u

1 f  = 1 / 2 u + 1 / u

u = 3 f / 2

= 3 × 5 0 / 2

= 7 5 c m

Object Is placed at 7 5 c m from the mirror .

Thus ,

7 5 is the correct answer of this question .

#SPJ2

Answer 2

Answer:

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