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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Determination of Planck constant

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1. Among the following the highest value of the Knee voltage is for

a: a red LED Explanation

Explanation

b: a yellow LED Explanation

Explanation

c: a green LED Explanation

Explanation

d: a blue LED Explanation

Explanation

2. Planck constant

a: is a universal constant Explanation

Explanation

b: depends on the medium Explanation

Explanation

c: depends on the wavelength of light Explanation

Explanation

d: is proportional to the temperature Explanation

Explanation

3. Planck constant is used

a: for calculating dimension of a particle. Explanation

Explanation

b: for describing the behavior of particles and waves at an atomic scale. Explanation

Explanation

c: for measuring the gravitational force. Explanation

Explanation

d: for the estimation of curvature of a mirror Explanation

Explanation

4. Planck law describes

a: total heat content of a system Explanation

Explanation

b: the spectrum of a laser beam. Explanation

Explanation

c: the spectrum of black body radiation Explanation

Explanation

d: excited state lifetime of a molecule Explanation

Explanation

5. The wavelength of UV light that has an energy of 2.39 × 10-18 J is close to

a: 83 nm Explanation

Explanation

b: 123 nm Explanation

Explanation

c: 254 nm Explanation

Explanation

d: 365 nm Explanation

Explanation

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