Quiz 3.1 - Becquerel discovers radiation from uranium

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This quiz has 7 questions. Click Submit at the end to mark it. No personal data is collected.

1. Henri Becquerel was investigating rocks that contained uranium. What was he originally interested in? *

1 point

How much radiation they gave off

Why they glowed when sunlight hit them - an effect called fluorescence

How they absorbed X-rays

2. What exciting new phenomenon had recently been discovered that Becquerel was also interested in? *

1 point

Gamma radiation

Ultraviolet light

X-rays

3. Why did Becquerel want to see if uranium could also cloud nearby film at the same time as it was fluorescing? *

1 point

To see if uranium gave off these newly discovered X-rays when it fluoresced

To see if uranium was radioactive

To see if X-rays could stop the fluorescence

4. Which of these arguments did Becquerel use to convince himself that uranium did give off X-rays. Choose two. *

1 point

The light from fluorescing uranium couldn't have gone through the light-proof box lid

X-rays were leaking through small gaps in the box lid

X-rays were known to be able to go through the box lid, but not through metal

Required

5. Why couldn't Becquerel repeat the experiment one day? *

1 point

There was no electricity to make X-rays

It was cloudy and so the uranium wasn't fluorescing

His sample of uranium rock had run out of fluorescence

6. What did Becquerel conclude when he discovered that the uranium fogged film all the time, even when it wasn't fluorescing? *

1 point

Uranium gave off a strange, new kind of ray that no one had detected before

His uranium was faulty

Uranium sometime fluoresced even when it was in the dark

7. How did Becquerel come to discover that uranium gave off a new kind of ray? *

1 point

He was intentionally looking for a new kind of ray that had never been discovered before

He used a scientific model to predict the existence of a new kind of ray and then carefully looked for it

He found out by accident when he was investigating something completely different

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