Matter Waves & Uncertainty

de Broglie wavelength and Heisenberg principle. Ideal for students preparing board exams and competitive tests.

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QUESTION NO 01

Radioactivity is?

Answer: Spontaneous nuclear decay

Radioactive decay is spontaneous transformation of unstable nuclei.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 02

Alpha particle is?

Answer: Helium nucleus (2p+2n)

α = ⁴He nucleus.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 03

Beta-minus particle is?

Answer: Electron

β⁻ emission sends out an electron (and antineutrino).

Shahzad Mahota @shahzad-mahota

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QUESTION NO 04

Gamma rays are?

Answer: High-energy photons

γ radiation is electromagnetic radiation from nuclei.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 05

Half-life is the time for?

Answer: Half the radioactive nuclei to decay

T½ is time for N → N/2.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 06

E = mc² relates?

Answer: Mass and energy equivalence

Rest energy E₀ = mc²; mass–energy equivalence.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 07

Pair production requires photon energy at least?

Answer: 1.022 MeV

Creating e⁻e⁺ needs ≥ 2 × 511 keV = 1.022 MeV.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 08

X-rays are produced when?

Answer: Fast electrons strike a metal target

Bremsstrahlung/characteristic X-rays arise from electron–target interactions.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 09

Nuclear fission is?

Answer: Splitting of a heavy nucleus

Fission: heavy nucleus splits into lighter fragments, releasing energy.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 10

Nuclear fusion is?

Answer: Combining light nuclei

Fusion joins light nuclei (e.g. in stars) releasing energy.

Shahzad Mahota @shahzad-mahota

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Shahzad Mahota

@shahzad-mahota

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Matter Waves & Uncertainty

Radioactivity is?

Alpha particle is?

Beta-minus particle is?

Gamma rays are?

Half-life is the time for?

E = mc² relates?

Pair production requires photon energy at least?

X-rays are produced when?

Nuclear fission is?

Nuclear fusion is?

Published By

Shahzad Mahota

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Matter Waves & Uncertainty

Radioactivity is?

Explanation

Alpha particle is?

Explanation

Beta-minus particle is?

Explanation

Gamma rays are?

Explanation

Half-life is the time for?

Explanation

E = mc² relates?

Explanation

Pair production requires photon energy at least?

Explanation

X-rays are produced when?

Explanation

Nuclear fission is?

Explanation

Nuclear fusion is?

Explanation

Published By

Shahzad Mahota

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