Contradiction with John 20:27
This verse contradicts Luke 24:40 because in John, Thomas needs to touch Jesus' wounds to believe, while Luke focuses on Jesus showing His hands and feet to affirm His identity without mention of touch for belief.
John 20:27: Then saith he to Thomas, Reach hither thy finger, and behold my hands; and reach hither thy hand, and thrust [it] into my side: and be not faithless, but believing.
Contradiction with Mark 16:12
This verse contradicts Luke 24:40 as it notes that Jesus appeared in a different form, whereas Luke emphasizes Jesus showing His physical wounds to prove His unchanged physical form.
Mark 16:12: After that he appeared in another form unto two of them, as they walked, and went into the country.