You create an illusory object no greater than a 10 ft cube. This object appears at a spot you can see within range and lasts for the duration. A creature that uses its action to examine the image can determine that it is an illusion with a successful Intelligence (Investigation) check against your spell save DC, this check is made with advantage.   Despite being evidently an illusion, the object has some degree of physical interaction, and can be used just like a real object, except that it cannot carry or support more than 20 pounds. creatures that try to pass through the object must make a Strength check against your spell DC, which will cause them to pass through like an ordinary illusion.