How to expload terrain when a part touches it?

So I am trying to make a deadly Leaser Beam that destroys everything in its way though I am having a issue with terrain because when you try to set its parent it errors. My issue is that when the Laser Beam hits the terrain a explosion never spawns, and I am sure of that as I tested that when the Laser Beam hits the Terrain it never prints anything if I add a print. Also occasionally for some reason it says it cannot change Terrain's parent even though I have a filter so it will never change Terrain's parent, my Theory behind that is its just too much lag. Here is my script:

script.Parent.Activated:Connect(function()
	if script.Parent.Parent.Name ~= "Gooncreeper" then
				script.Parent:Destroy()
	elseif script.Parent.Parent.Parent.Name ~= "Gooncreeper" and script.Parent.Parent.Name == "Backpack" then
		script.Parent:Destroy()
	end
	ToolLocation = script.Parent
	script.Parent = game.Lighting
	ToolLocation:Destroy()
	game.Lighting.DEATHBEAM.Parent = game.Workspace
	Message = Instance.new("Message", game.Workspace)
	for i = 1, 10 do
		Message.Text = "World Destruction In: ".. 10 - i
		wait(1.5)
	end
	PartLength = 0
	Message:Destroy()
	repeat
		game.Workspace.DEATHBEAM.BEAM.Size = game.Workspace.DEATHBEAM.BEAM.Size + Vector3.new(5,0,0)
		PartLength = PartLength + 5
		game.Workspace.DEATHBEAM.BEAM.Position = game.Workspace.DEATHBEAM.BEAM.Position + Vector3.new(-2.5,-2.25,0)
		wait(0.01)
		PartsTouchingBeam = game.Workspace.DEATHBEAM.BEAM:GetTouchingParts()
		for i, v in pairs(PartsTouchingBeam) do
			if PartsTouchingBeam[i] ~= game.Workspace.DEATHBEAM.Part then
				if PartsTouchingBeam[i].Name ~= workspace.Terrain then
					PartsTouchingBeam[i]:Destroy()
				else
					ExplodeTerrain = Instance.new("Explosion")
					ExplodeTerrain.Position = PartsTouchingBeam[i].Position
					ExplodeTerrain.Visible = false
					ExplodeTerrain.Parent = game.Workspace
					ExplodeTerrain:Destroy()
				end
			end
		end
	until PartLength == 10000
end)

What you are checking for is if the name of the part is equal to an object. Comparing a string with an object will always return false. This means that it will always try to destroy the terrain. A fixed version would be this:

if PartsTouchingBeam[i].Name ~= "Terrain" then

You cant explode terrain, due to how roblox made it.

The only way you can do it is if you create terrain using blocks and parts, which can be very tricky if you have lots of mountains and holes.

sorry to be the bringer of bad news.