Question

spiracle mirror produces an image of magnification twiners 1 on a screen placed at a distance of 50 cm from the mirror
i) write the type of mirror
ii) find the distance of the image from the object
iii) what is the focal length of the mirror
plzz give all the answers ​

Answer 1

Answer:

(a)  As magnification is in negative the image will be  down the principle axis compared to the object and will form in Concave Mirror.

(b)  The distance of image from the object is zero, real and inverted image of the same size is formed at the same place where object is placed.

(c)   Spherical mirror has a radius of curvature R and a focal length i.e 

F=2R

F=250

F=25cm

Explanation:

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Answer 2

Explanation:

I think magnification given is -1

i) if it is -1 the type of mirror is concave or if it is +1 then is is convex

ii) I am taking m=-1 if it is +1 pls do it by yourself by this formula

m=-v/u

given d= 50cm so

-1=-v/50-v=-50

v=50cm

iii) To find focal length we use formula

1/f=1v+1/u

= 1/50+1/50

1/f= 2/50

1/f= 1/25

by cross multiply we get

f= 25cm