Example of Logical Schema vs Physical Schema?
I think this StackOverflow Answer probably defines the difference between the two pretty well.
Specifically these two points:

A logical schema is a conceptual model of the data. In relational databases, it's often platform-agnostic - i.e. the logical schema can, in principle, be implemented on any SQL database.


The physical schema converts the logical schema into an implementation that works on a particular database platform. Sometimes, this is a largely mechanical exercise, applying the right datatypes to the attributes...

So in other words, if you had a schema that represented MovieTheaters, you'd probably have a few tables Movies, TicketSales, ConcessionSnacks. The TicketSales table would probably have a TicketId column, a Price column, and a MovieId column. This high level detail is essentially your logical schema.
Once you start implementing this schema on a specific database system, take Microsoft SQL Server for example, and using features and data types specific to Microsoft SQL Server, is when it becomes a physics schema. For example, your TicketSales table's TicketId column could be a INT data type with a primary key on it, and the MovieId could be a BIGINT field with a many-to-one foreign key on it, and the Price column could be a DECIMAL(4,2). And the Movies table can have a unique constraint on the MovieTitle column to prevent duplicate Movies being inserted into it.