Is there an adapter to switch tv to smart tv
No, but most Blu-ray players are "smart" players and include a Netflix app as well as other services such as HULU, Amazon, etc. Usually, the Blu-ray player will have stickers or or emblems printed on the box or the on the player itself with "Netflix" , etc.
Connect the Blu-ray player to the TV using an HDMI cable. Connect the Blu-ray player to your router/home network with an ethernet cable or wirelessly if your player has built-in Wi-fi. Once that is done you can go to the Main Menu on the player and select Netflix. That should open the Netflix app and connect you for watching Netflix.
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