What is the difference between introspection and reflection?

Question

Can anyone explain from a language/environment agnostic perspective the difference between these two notions?

Also is there a set of conditions that programming language

Answer 1

Type introspection:

Ability of a programming language to examine the type or properties of an object at runtime.

Example (Java):

String myObj1 = new String();
MyCustomObject myObj2 = new MyCustomObject();
if(myObj2 instanceof MyCustomObject) {
    System.out.println("This is an example of type interospection");
}

Reflection:

Ability of a programming language to achieve below things at runtime.

• Type introspect (as seen above)
• Examine and modify a object.
• and much more