Explosion.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class ExploderForceRange : MonoBehaviour
{
    public float radius = 5f;
    public float force = 70f;
    private void OnTriggerEnter(Collider other)
    {
        // get all surrounding objects collider with in radius range
        
        var allObject = Physics.OverlapSphere(transform.position, radius);

        foreach (var item in allObject)
        {
            Rigidbody rb = item.GetComponent<Rigidbody>();
            if (rb != null)
            {
                // make sure that position placeholder of the below function is position of  
                // the object on which script is attached
                rb.AddExplosionForce(force, transform.position, radius);
                
                // or else weird stuff will happen
                //like this live videos https://youtu.be/6F3AhLpNwec
            }
        }
    }
}