Question

PLEASE CHECK ALL ANSWERS BELOW THAT APPLY / ARE CORRECT.

Assume a cart carrying a monkey and two firecrackers is moving at 0.7c relative to you.

Both firecrackers explode simultaneously in the monkey's reference frame. The monkey is standing at an equal distance to each firecracker. The monkey is not moving relative to his cart. You are standing on the ground in the position shown when the firecrackers explode.

If the fireworks go off simultaneously in the monkey's reference frame then according to the monkey
1A. light from the back explosion will reach the monkey before light from the front explosion.
1B. light from both explosions will reach the monkey at the same time.
1C. light from the front explosion will reach the monkey before he sees light from the back explosion.

According to the monkey's frame of reference
2A. you will end up seeing light from the back-of-cart explosion first.
2B. you will end up seeing light from both explosions simultaneously.
2C. you will end up seeing light from the front-of-cart explosion first.

In your frame of reference,
3A. light from the back-of-cart explosion will reach you before you see light from the front explosion.
3B. light from both explosions must reach you at the same time.
3C. light from the front-of-cart explosion must reach you before you see light from the back-of-cart explosion.

Which firecracker must have gone off first in your reference frame?
4A. Front
4B. Back
4C. They went off at the same time in your reference frame.

The correct answers are

_____ 1B

_____ 4B

_____ 1A

_____ 1C

_____ 2A

_____ 2B

_____ 4A

_____ 3B

_____ 3C

_____ 3A

_____ 4C

_____ 2C

Back Front monkey You Agsurme ฮ ;art carrying menkmy and two firecrackers is moving o+0.7s relativ" to you. eth firecracker explede sin tsneeusly in th. men sys trerence rame. The markey is standing at an ual distance te each firecracker T e men ty s nst moving rela t te n s cert. You are tandr 9 on t-ground in the Positie s ewn when the r terse ers explede. rte rireworks go 5imultaneously in re monkey reference rrarme then according to re monkey 14. light irom the Deck explosion will resch the monkey betore light from the frort explosion 1B light from both explosions wil rtsch the monkey ฮt the same tim 1C ight rom the frent xplosion will rench the monkry before he sens light frem the Back explosion According to the menkey's rame of reference 2A ysu will end up seing light trom the Dack-of-cart explasion first. 2B. yau will end up seeing 2C you will end up seeing light rom the front-o-cart explasion first light from both n your frams of re erencn 3A light trom the bak-cartexplesian will reach yeu beare yeu see ight from the front explesion 3. light rom beth explesions must reach yau at the same time. 3C light from the front-f-cart explesion must reach yo betore you see light trom the back-of-cart explasion Which firecracker must have gone off first in your reference rame 4 Front B Eack 4C They went off at the same time in your reerence rame The correct enswers ar 18 48 24 23 兼38

Answer 1

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→(in youn frame of referen ce: inmon ane exPlosions ane 5imuttaneu bu not simultaneou/0y in youn frame. Considen non frame time o5 b back kne cnacken. んbnont oun hae Nn y2. + is movi꺼 'ret you. So χǐ > neach you before ℃ou see lid lut from the front ex Plosion Pistus simila as above Back fine Cra cKer must hare gong off Anst in your_ 几Chen ence-