The concave mirror with a focal length of 3 cm forms a real and inverted image of a 1 cm arrow placed 4 cm in front. The magnification is greater than 1, signifying a larger image, and the negative image distance indicates a real image on the same side as the incident light.
The concave mirror's focal length of 3 cm indicates a converging mirror, where parallel rays of light are focused to a point. Placing a 1 cm arrow 4 cm in front of the mirror creates a real and inverted image.
According to the mirror formula (1/f = 1/v + 1/u), where f is the focal length, v is the image distance, and u is the object distance, the image distance (v) is calculated as follows:
1/3 = 1/v + 1/(-4).
Solving for v gives v = -12 cm. The negative sign denotes a real image formed on the same side as the incident light. The magnification (|v/u|) is greater than 1, indicating the image is larger than the object. The image is inverted due to the concave mirror, and its size and position depend on the mirror's characteristics and the object's placement.