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Chapter 36: Q. 8 (page 1059)

Bjorn is standing at x=600m. Firecracker 1explodes at the origin and firecracker2explodes at x=900m. The flashes from both explosions reach Bjorn鈥檚 eye at t=3.0渭s. At what time did each firecracker explode?

Short Answer

Expert verified

We have given that, Bjorn is standing at x=600m.

Firecracker1explodes at the origin and firecracker explodes at x=900m.

The flashes from both explosions reach Bjorn鈥檚 eye at t=3.0渭s.

t2=1.0渭sLight left firecracker 2explode att2=2渭s.

Step by step solution

01

Given Information

We have given that, Bjorn is standing at x=600m.

Firecracker1explodes at the origin and firecracker explodes at x=900m.

The flashes from both explosions reach Bjorn鈥檚 eye at t=3.0渭s.

02

Simply

Bjorn is 600maway from the source. It takes 2.0渭sfor light to reach Bjorn.

t=600speedoflightt=6003脳108t=2脳10-6st=2渭蝉

This flash arrived at Bjorn at t=2.0渭sleaving firecracker at t1=1.0渭s.

t2=3003脳108t2=10-6t2=1渭s

It takes 1.0渭sfor the flash from Firecracker 2to reach Bjorn.

Light left firecracker 2at t2=1.0渭s.

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