[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"exercise-C1-1406":3},{"preview":4,"open":14,"missing":37},{"id":5,"number":6,"total":7,"level":8,"course":9,"activity":10,"discriminator":11,"title":12,"slug":13,"instructions":14,"excerpt":15,"prompts":16,"lock":19,"access":20,"updated":21,"previous_id":22,"next_id":23,"previous":24,"next":28,"first":32},1406,44,70,"C1","reading","multiple_matching","reading_multiple_matching","A Brief History of Photography","a-brief-history-of-photography",null,"Photography as we know it began in the early 19th century with the invention of the camera obscura. These rudimentary devices projected light through a small hole onto a surface, allowing early experimenters to trace the outlines of real-world images. The breakthrough came when chemicals were used to permanently fix…",[17,18],"Which section describes a time when people needed chemicals to make an image last?","Which section discusses how photography became a hobby for non-experts?","login","pro","2026-10-02T14:14:49",1405,1407,{"id":22,"number":25,"title":26,"slug":27},43,"Personalities","personalities",{"id":23,"number":29,"title":30,"slug":31},45,"The Psychology of Music","the-psychology-of-music",{"id":33,"number":34,"title":35,"slug":36},1363,1,"Sources of Clean Power","sources-of-clean-power",false]