Filtergrams of 1B/M1-M4 Ha flare starting at 22h
of November 11, 1980 are digitized, and isophote lines are drawn in order to compare with hard X-ray, soft X-ray and microwave burst images. The following results are revealed.1. For the first maximum, high energy electrons do not penetrate the chromosphere. Ha flare may be caused by heat conduction from 107
K hot plasma which generated hard and soft X-ray emissions.2. The second maximum can be infered to be caused by bremsstralung of high energy electrons. The Ha flare maximum occured later than that of X-ray burst for less than 5 seconds.3. During the flash phase the area and the intensity of Ha emission enhanced simultaneously.4. From the changes of transverse magnetic fields outlined by Ha fibrils, 1031
engs magnetic energy is estimated to be released in this flare.