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3 years ago

What is threshold frequency

Physics

2 answers:

snow_lady [41]3 years ago

7 0

Answer:

Electrons are emitted when the frequency of the incident radiation is higher than the threshold frequency for the metal.

Explanation:

spayn [35]3 years ago

3 0

Threshhold frequency is defined as the minimum light frequency necessary to start photo-electric emission from the surface. This frequency is just effecient enough to emit electrons without any additional force or energy. this minimum frequency creates the necessary result that is sought by the person. The photo electric emission for certain metals can occir with threshhold frequency. The importance of this threshhold frequency lies in the fact that this has been used to create numerous instruments like amplifiers for use of people.

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mafiozo [28]

Answer:

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Hope this helped

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3 years ago

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vovikov84 [41]

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3 years ago

A car of mass m, traveling at constant speed, rides over the top of a round hill. How do the normal force of the road on the car

dybincka [34]

Answer:

The normal force will be lower than the gravitational force acting on the car. Therefore the answer is N < mg, which is <em>option B</em>.

Explanation:

Over a round hill, the centripetal force acting toward the the radius of the hill supports the gravitational force (mg) of the car. This notion can be expressed mathematically as follows:

At the top of a round hill

$Normal force = Gravitational force - centripetal force$

At the foot of a round hill

$Normal Force = centripetal force + Gravitational force$

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3 years ago