You view your face in a concave mirror of focal length 20 cm and wish it to be magnified by a factor of 1.5. What should you do?

u = 6.667 cm

Explanation:

given,

Focal length of the concave mirror, f = 20 cm

magnification factor = 1.5  

we know,

v is the distance of the image

u is the distance of the object

v = -1.5 u

Using mirror formula

u = 6.667 cm

distance of the person from the mirror is equal to 6.667 cm.

truck y has a greater velocity than truck x.

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