Check if player is blocked by object using raycast?

I have a script that checks whether the player is in vision cone and I am aiming to check whether the player is blocked by an object like a Part (sending a ray from npc head to chr head and check if something is blocking it).

Thanks in advance!

local rs = game:GetService("RunService")

local npc = workspace.NPC
local chr = game.Players.LocalPlayer.Character

rs.RenderStepped:Connect(function()
    local npcToCharacter = (chr.Head.Position - npc.Head.Position).Unit
    local npcLook = npc.Head.CFrame.LookVector

    local dotProduct = npcToCharacter:Dot(npcLook)

    if dotProduct > .7 then
        local rayParams = RaycastParams.new()
        rayParams.FilterType = Enum.RaycastFilterType.Whitelist
        rayParams.FilterDescendantsInstances = {chr}

        local ray = workspace:Raycast(npc.Head.Position, chr.Head.CFrame.LookVector * 100, rayParams)

        if ray then
            print(ray.Instance)
            workspace.Baseplate.BrickColor = BrickColor.new("Bright red")
        else
            workspace.Baseplate.BrickColor = BrickColor.new("Bright green")
        end
    else
        workspace.Baseplate.BrickColor = BrickColor.new("Bright green")
    end
end)