Question

we wish to obtain an equal size inverted image of a candle flame on a screen kept at a distance of 4 m from the candle flame a name the type of lens that should be used be what should be focal length of a lens and what distance from the candle flame the lens place see draw the diagram to show the image formation in this case

Answer 1

HEY MATE ..✌✌✌

To obtain a real and inverted image of same size we must use CONVEX LENS.
In a convex lens when object is held at 2f than the image is formed real and inverted.
We know than:
2f = 2×f
i.e 4 =2×f
f = 4/2 = 2 m
hence, The focal length is 2 m.
The lens is placed at a distance of 4 mfrom the candle.

HOPE IT HELPED..✌✌✌
if it helped than Mark as BRAINLIEST

Answer 2

Explanation:The type of the lens used is Convex as we need to get real and inverted image.If the focal is 2f we get real and inverted image.So, Distance of Flame from lens = 4m = 4 For equal sized inverted image u = 2f = 4 f is the focal length of lens u=2f u=4 4/2=f f=2m The lens is placed at a distance of 4m from the candle. I hope it helped

Sorry for the closely arranged sentences