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Test: Planck’s Quantum Theory - NEET MCQ


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15 Questions MCQ Test - Test: Planck’s Quantum Theory

Test: Planck’s Quantum Theory for NEET 2024 is part of NEET preparation. The Test: Planck’s Quantum Theory questions and answers have been prepared according to the NEET exam syllabus.The Test: Planck’s Quantum Theory MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Planck’s Quantum Theory below.
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Test: Planck’s Quantum Theory - Question 1

The energy of a photon in Joules that has a wavelength of 9.0 m is:

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Test: Planck’s Quantum Theory - Question 2

The ratio of the energy of a photon of 2000 Ǻ wavelength radiation to that of 4000 Ǻ radiation is:

Detailed Solution for Test: Planck’s Quantum Theory - Question 2

We have E = hc/λ
E1/E2 = 4000Å/2000Å = 2

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Test: Planck’s Quantum Theory - Question 3

A radio operator broadcast on the 6-meter band. The frequency of this electromagnetic radiation is __________ MHz.

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Test: Planck’s Quantum Theory - Question 4

Electromagnetic radiation travels through vacuum at a speed of __________ m/s.

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The speed of light (electromagnetic radiation) through vacuum has a constant value of 3.00 x 108m/s and is independent of the wavelength in vacuum.

Test: Planck’s Quantum Theory - Question 5

 What is the frequency of light in s-1 that has a wavelength of 3.12 x 10-3 cm?

Detailed Solution for Test: Planck’s Quantum Theory - Question 5

The wavelength (λ) and frequency (ν) of electromagnetic wave is related by the equation c = λ.ν,

Where c is the speed of light = 3.00 x 108 m/s, λ is the wavelength in m and ν is the frequency is s-1or Hz.

Substituting the values in the formula, we get,

c = λ.ν

ν = c/λ

ν = 3.0 x 108 / 3.12 x 10-5

= 0.96 x 1013 m =  9.62 X 1012

Test: Planck’s Quantum Theory - Question 6

The ejected electrons from the surface of metal in photoelectric effect are called:

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If light beyond a specific threshold frequency hits a metal surface, electrons are ejected from the surface of the metal. The minimum energy required to eject an electron from the surface is called the work function of the metal. These ejected electrons are called photoelectrons. The kinetic energy of the most energetic electron among these photoelectrons is called the maximum kinetic energy.

Test: Planck’s Quantum Theory - Question 7

 If the value of azimuthal quantum number is 3, the possible values of magnetic quantum numbers would be:

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The total possible values of m for l range from – through 0 to +. 

Test: Planck’s Quantum Theory - Question 8

What is the energy of a photon that has a wavelength of 13.2 nm?

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 = 1.507 x 10-15J.

Test: Planck’s Quantum Theory - Question 9

What is correct about wave number?

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Wavenumber is defined as the number of complete wave cycles per unit length of a linear space. It can also be referred to as the spatial frequency of the waves represented in radians per unit distance, or cycles per unit distance. It is usually measured in units of reciprocal centimeters (cm-1) and reciprocal meters (m-1).

Test: Planck’s Quantum Theory - Question 10

The wavelength of light that has a frequency of 1.20 × 1013s-1 is __________ m.

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The speed of all form of electromagnetic wave is related by the equation c = λ.v, whereby, λ = 3.0 x 108 / 1.2 x 1013 = 2.5 x 10 -5 m.

Test: Planck’s Quantum Theory - Question 11

 Which of the following radiation has the shortest wavelength.

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Radio waves, infrared rays, visible light, ultraviolet rays, X-rays, and gamma raysare all types of electromagnetic radiation. Radio waves have the longest wavelength, and gamma rays have the shortest wavelength.

Test: Planck’s Quantum Theory - Question 12

 Who discovered and first used the constant h = 6.6 x 10-34 J.s?

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Max Planck gave the Planck’s quantum theory and was the first to determine the value of h which is the Planck’s constant.

Test: Planck’s Quantum Theory - Question 13

The energy of a photon of light has what kind of proportionality to its frequency and its wavelength.

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As E=h(frequency) E is directly proportional to frequency and as frequency = speed of light / wavelength frequency is inversely proportional to wavelength.

Test: Planck’s Quantum Theory - Question 14

What is the wavelength of light (nm) that has a frequency 4.62 ×1014s-1?

Detailed Solution for Test: Planck’s Quantum Theory - Question 14

The wavelength (λ) and frequency (ν) of electromagnetic wave is related by the equation c = λ.ν, whereby, λ = 3.0 x108 / 4.62 ×1014 =  0.649 x 10-6 m = 649nm

Test: Planck’s Quantum Theory - Question 15

What is the frequency of a photon that has an energy of 3.7 x 10-18J?

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