question: Why were experiments done on luminiferous aether in the 19 Century ?
answer: `` While the interstellar absorbing medium may be simply the ether , -LSB- it -RSB- is characteris
turker_answer: Experiments were done on luminiferous aether in the 19 Century because `` While the interstellar absorbing medium may be simply the ether , -LSB- it -RSB- is characteris .
rule-based: Experiments were done on luminiferous aether in the 19 Century because of `` While the interstellar absorbing medium may be simply the ether , -LSB- it -RSB- is characteris .