Draw a ray diagram in each of the following cases to show the formation of image, when the object is placed :
at 2F of a convex lens.
State the signs and values of magnifications in the above mentioned case.

Explanation

### Step-by-Step Solution:

1. **Draw the Convex Lens:**
Begin by drawing a vertical line to represent the convex lens. Label the lens as "Convex Lens."

2. **Draw the Principal Axis:**
Draw a horizontal line through the center of the lens. This line is known as the principal axis.

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