An infinitely long rectangular strip is placed on principal axis of a concave mirror as shown in figure. One end of the strip coincides with centre of curvature as shown.The height of rectangular of strip is very small in comparison to focal length of the mirror.Then the shape of image of strip formed by concave mirror is.
An infinitely long rectangular strip is placed on principal axis of a concave mirror as shown in figure. One end of the strip coincides with centre of curvature as shown.The height of rectangular of strip is very small in comparison to focal length of the mirror.Then the shape of image of strip formed by concave mirror is.
The correct option is D Triangle
The
object AB is lying on the principal
axis. Since the object is infinitely long, the rays coming from the point Awill go through the focal point (F) of the concave mirror after reflection.
As the thickness of the bar is very small, we can consider that the point B coincides with the point C. Therefore the rays coming from the
point B will make an inverted image
on the center of the mirror.
Hence
the final image will look like a triangle.
So,
option (C) is correct.
The object AB is lying on the principal axis. Since the object is infinitely long, the rays coming from the point Awill go through the focal point (F) of the concave mirror after reflection. As the thickness of the bar is very small, we can consider that the point B coincides with the point C. Therefore the rays coming from the point B will make an inverted image on the center of the mirror.
Hence the final image will look like a triangle.
So, option (C) is correct.
