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1. ### when does fog dissipate?

Radiation fog is formed by the cooling of land after sunset by thermal radiation...fog layer can be less than a meter deep but turbulence can promote a ...

2. ### F.3 Physics 20點

1. Radiation thermometer is an instrument which measures the temperature of a hot object...the object and making some observation on it; examples include ...

3. ### Clouds and infrared and UV

Infrared radiation actually composes a range of wavelengths. From [near infrared.... However, clouds itself could also emit infrared radiation, but of long ...

4. ### penetrating abilities of ionising radiation

Penetrating abilities : Alpha particles < Beta particles < Gamma rays Reason : Energy / Mass : Alpha is smallest, Beta...

5. ### 放射輻射的穿透能力愈大，對人體的傷害愈大?

... radiaiton (x-ray or gamma ray) poses great radiation hazard as conpared with low penetrating radiation, (alpha... the reason why externally, highly ...

6. ### 有關紅外線的問題~

1.紅外線係咪等於熱? No, infrared radiation is NOT the same as heat. Heat is... on the wavelengths of the infrared radiation, infrared could penetrate ...

7. ### 究竟輻射會不會自動消散?

You have to differentiate between the [radiation] from mobile phones, base stations with that from X-ray ... at present no conclusive scientific evidence ...

8. ### 如何應用弗林明左手定則找出 -- 在電場和磁場中的輻射軌跡？？

I am not sure the radiation you refer to are alpha particle, beta particle and gamma radiation or not. So... no need to use Fleming&#39;s left hand ...

9. ### F.5 phy

Yes. The count rate of the GM counter of alpha, beta and gramma radiation are a>b>g, this is same as to the ionization power of them...

10. ### gamma ray~

... gamma rays are the most dangerous form of radiation emitted by a nuclear explosion because of the difficulty...about 1 to 2 mSv a year, and the average ...
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