Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 81

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Weekly Quiz Competition

Question 1
4 / -1

The energy of a photon of light of wavelength 450 nm is

A
4.4 × 10^–19 J

B
2.5 × 10^–19 J

C
1.25 × 10^–17 J

D
2.5 × 10^–17 J

Solution
Question 2
4 / -1

The value of Plank energy is

A

B

C

D
Question 3
4 / -1

Which of the following statements is not correct?

A
Photographic plates are sensitive to infrared rays

B
Photographic plates are sensitive to ultraviolet rays

C
Infra-red rays are invisible but can cast shadows like visible light

D
Infrared photons have more energy than photons of visible light

Solution
Question 4
4 / -1

If we express the energy of a photon in KeV and the wavelength in angstroms, then energy of a photon can be calculated from the relation

A
E = 12.4 hv

B
E = 12.4 h/λ

C
E =12.4 /λ

D
E = hv

Solution
Question 5
4 / -1

The frequency of a photon, having energy 100 eV is (h = 6.6 × 10^–34 J-s)

A
2.42 × 10²⁶ Hz

B
2.42 × 10¹⁶ Hz

C
2.42 × 10¹² Hz

D
2.42 × 10⁹ Hz

Solution
Question 6
4 / -1

A photon of wavelength 4400 Å is passing through vacuum. The effective mass and momentum of the photon are respectively.

A
5 × 10^–36 kg, 1.5 × 10^–27 kg-m/s

B
5 × 10^–35 kg, 1.5 × 10^–26 kg-m/s

C
Zero, 1.5 × 10^–26 kg-m/s

D
5 × 10^–36 kg, 1.67 × 10^–43 kg-m/s

Solution
Question 7
4 / -1

Which of the following is incorrect statement regarding photon?

A
Photon exerts no pressure

B
Photon energy is hv

C
Photon rest mass is zero

D
None of the above
Question 8
4 / -1

The mass of a photo electron is

A
9.1 × 10^–27 kg

B
9.1 × 10^–29 kg

C
9.1 × 10^–31kg

D
9.1 × 10^–34kg
Question 9
4 / -1

Einstein\'s photoelectric equation states that Ek = hv–ɸ). In this equation E_krefers to

A
Kinetic energy of all the emitted electrons

B
Mean kinetic energy of the emitted electrons

C
Maximum kinetic energy of the emitted electrons

D
Minimum kinetic energy of the emitted electrons
Question 10
4 / -1

The photo-electrons emitted from a surface of sodium metal are such that

A
They all are of the same frequency

B
They have the same kinetic energy

C
They have the same de-Broglie wavelength

D
They have their speeds varying from zero to a certain maximum