physics Olevelseminaritems finalcopy.pdf

(a).Sound was hard at different intervals and hence estimate how far the friends stay from each other. • The hall fills up quickly, and the temperature inside rises from 200C to 350C The guests notice that the sound from the speakers seems louder even though the sound operator had not changed the volume setting. • The lighting crew uses a blue laser beam marked 450nm. The manager wants to ensure the laser is within the safe frequency range for public use. • Some guests wear clothes with yellow patterns and others with white spots under the blue laser beam, the clothes seem to change colour. • In the VIP section, mirrors curved inwards are installed in the dressing area. (c) Clothes has changed color when the light flashed on them stating the color of the lights. (b) The sound heard was unclear and indistinct 13-06-2026 Speed of light = 3.0×109ms-1 1. A wedding ceremony was held in a garden next to a tall building about 18m away a band playing at the function was friends A and B who are neighbors but A could hear the sound after 6s while B after 7s decided to go and attend the function at the venue the friends and clear and indistinct sound later on in the night they realized that they are clothes changed in colors as the lights flashed on them, the blue suits were colored black whereas the green capes we are colored black. The observations left the two friends confused. KYADDONDO S.S O’LEVEL PHYSICS SEMINAR ITEMS (d) Echoes maybe of importance to society LIGHT AND WAVES 2. A