What book in the Bible describes how Jesus will look like when he comes back from Heaven?

Answer 1

Revelation, when John talks about Jesus that shines with bronze and etc.

====

The above is true and there's more. Just to expand a bit.

The last book of of The Bible is called The Revelation of Jesus. The apostle John is the writer. It is important to understand that Jesus is now "glorified," meaning He has taken on the glory He had before He came to earth. However, He is now united with His human body, and, as such, His glorification is as spirit and as human. Those who now trust Christ Jesus will have an appearance very similar to this when they join Him in heaven. Christ's glorified body is nearly impossible to view with human eyes due to His brightness, as is also ascribed to some appearances of angels throughout scripture. However, He allowed Himself to be seen vividly by John and to have His appearance shared with His followers.

Revelation 1 offers a description of Christ now glorified:

12 Then I turned to see the voice that was speaking with me. And having turned I saw seven golden lampstands; 13 and in the middle of the lampstands I saw one like a son of man, clothed in a robe reaching to the feet, and girded across His chest with a golden sash. 14 His head and His hair were white like white wool, like snow; and His eyes were like a flame of fire. 15 His feet were like burnished bronze, when it has been made to glow in a furnace, and His voice was like the sound of many waters. 16 In His right hand He held seven stars, and out of His mouth came a sharp two-edged sword; and His face was like the sun shining in its strength.

17 When I saw Him, I fell at His feet like a dead man. And He placed His right hand on me, saying, "Do not be afraid; I am the first and the last, 18 and the living One; and I was dead, and behold, I am alive forevermore, and I have the keys of death and of Hades.