A-LEVEL Exam A-LEVEL Physics
                    
                        3.9.1.1 Astronomical telescope consisting of two converging lenses
                    
                                    
                
                    
                        3.9.1.2 Reflecting telescopes
                    
                                    
                
                    
                        3.9.1.3 Single dish radio telescopes I-R U-V and X-ray telescopes
                    
                                    
                
                    
                        3.9.1.4 Advantages of large diameter telescopes
                    
                                    
                