"Shutter Speed"

                                    This picture appears to be completely white because the shutter speed 

                     was set at 1 second.

                                                                                   1/2 sec.

                                                                               1/3 sec.

                                                                    1/10 sec.

                                                                     1/40 sec.

                                                                       1/60 sec.

                                                                     1/100 sec.

                                                                        1/200 sec.

 1/400 sec.