The image of an object is located 6cm behind a convex mirror. If it's magnification is 0.6, calculate the focal length of the mirror

a

3.75cm

b

6.70cm

c

10.00cm

d

-15.00cm

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Explanation

Correct Option
d

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Discussions (28)

Dave333
4 years ago

Just a single mistake, can destroy a whole solvings

Dave333
4 years ago

Since it is a convex mirror,the image will be negative

Ayomi424
3 years ago

what are you guys doubting?
myschool is corrrect
the image will be negative since it is a diverging lens(Convex) but assuming its a Converging less (Concave) it will be positive

pls check your textboooks

MaraeX
7 years ago

This is not right naahh!!!..
This is a convex mirror. Meaning the image is negative because it's formed behind the mirror .

Once we go that way.. our answer bcomes.. D

Dave333
4 years ago

Very convincing 🤦, it's negative 🙍

datboy2026
2 months ago

But according to all sources I've checked focal length and image distance of a convex mirror is positive and for a concave mirror is negative. Also, I've seen multiple sources say that the formula for magnification for mirrors is m= -v/u that the formula m=v/u are for lenses.

Arabella123
2 years ago

A is the correct answer

Why can't we use the formula
M=V/F -1

Annabel
2 months ago

the answer is A and not d corrections should be made reason
behind convex mirror is positive and not negative and if u do your calculations the answer is 3.75

omgimd
1 year ago

(1/10)+(1/-6)...... it equals (-4/-60)..... am I wrong abi my Maths is terrible

Bankybenz
3 years ago

my school check it's supposed to be -10 -6/0.6 is -10

Glittz
5 years ago

the answer is A. 3.75.

Redhawk
2 years ago

guys they said that the lcm is 60 instead of 30 that is why they got 15, it is suppose to be 3.75, -3.75

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