app-myapp/app/tab2/tab2.page.ts

import { Component } from '@angular/core';

@Component({
  selector: 'app-tab2',
  templateUrl: 'tab2.page.html',
  styleUrls: ['tab2.page.scss']
})
export class Tab2Page {

  constructor() {}

  openImageInNewTab(imageUrl: string) {
    window.open(imageUrl, '_blank');
  }
}