From the dictionary representation means the description or portrayal of someone or something in a particular way or as being of a certain nature. It means the description or portrayal of someone and not that that someone is the same as that other one. We are all exact in human nature but we are not the same persons.
You keep (intentionally) missing a very important word - Christ radiates the glory of God Himself and is the EXACT representation of the Father. Everything the Father is, the Son is; there is nothing missing.
New International Version
The Son is the radiance of God’s glory and the exact representation of his being, sustaining all things by his powerful word. After he had provided purification for sins, he sat down at the right hand of the Majesty in heaven.
English Standard Version
He is the radiance of the glory of God and the exact imprint of his nature, and he upholds the universe by the word of his power. After making purification for sins, he sat down at the right hand of the Majesty on high,
Berean Study Bible
The Son is the radiance of God’s glory and the exact representation of His nature, upholding all things by His powerful word. After He had provided purification for sins, He sat down at the right hand of the Majesty on high.
Berean Literal Bible
who, being
the radiance of
His glory and
the exact expression of His substance, and upholding all things by the power of His word, through having made
the purification of sins, sat down at
the right hand of the Majesty on high.
King James Bible
Who being the brightness of
his glory, and the express image of his person, and upholding all things by the word of his power, when he had by himself purged our sins, sat down on the right hand of the Majesty on high;
New King James Version
who being the brightness of
His glory and the express image of His person, and upholding all things by the word of His power, when He had by Himself purged our sins, sat down at the right hand of the Majesty on high,
New American Standard Bible
And He is the radiance of His glory and the exact representation of His nature, and upholds all things by the word of His power. When He had made purification of sins, He sat down at the right hand of the Majesty on high,
NASB 1995
And He is the radiance of His glory and the exact representation of His nature, and upholds all things by the word of His power. When He had made purification of sins, He sat down at the right hand of the Majesty on high,
NASB 1977
And He is the radiance of His glory and the exact representation of His nature, and upholds all things by the word of His power. When He had made purification of sins, He sat down at the right hand of the Majesty on high;
Amplified Bible
The Son is the radiance
and only expression of the glory of [our awesome] God [reflecting God’s Shekinah glory, the Light-being, the brilliant light of the divine], and the exact representation
and perfect imprint of His [Father’s] essence, and upholding
and maintaining
and propelling all things [the entire physical and spiritual universe] by His powerful word [carrying the universe along to its predetermined goal]. When He [Himself and no other] had [by offering Himself on the cross as a sacrifice for sin] accomplished purification from sins
and established our freedom from guilt, He sat down [revealing His completed work] at the right hand of the Majesty on high [revealing His Divine authority],
Christian Standard Bible
The Son is the radiance of God’s glory and the exact expression of his nature, sustaining all things by his powerful word. After making purification for sins, he sat down at the right hand of the Majesty on high.
Holman Christian Standard Bible
The Son is the radiance of God’s glory and the exact expression of His nature, sustaining all things by His powerful word. After making purification for sins, He sat down at the right hand of the Majesty on high.
Contemporary English Version
God's Son has all the brightness of God's own glory and is like him in every way. By his own mighty word, he holds the universe together. After the Son had washed away our sins, he sat down at the right side of the glorious God in heaven.
Good News Translation
He reflects the brightness of God's glory and is the exact likeness of God's own being, sustaining the universe with his powerful word. After achieving forgiveness for the sins of all human beings, he sat down in heaven at the right side of God, the Supreme Power.
International Standard Version
He is the reflection of God's glory and the exact likeness of his being, and he holds everything together by his powerful word. After he had provided a cleansing from sins, he sat down at the right hand of the Highest Majesty
NET Bible
The Son is the radiance of his glory and the representation of his essence, and he sustains all things by his powerful word, and so when he had accomplished cleansing for sins, he sat down at the right hand of the Majesty on high.
You also totally run away from the Father openly and directly calling the Son "God" in Heb. 1:8.
And there are plenty of other verses that show and prove the Deity of Christ.