6.
The wavelength of X-rays is of the order of
A. 10 micron
B. 1 angstrom
C. 1 cm
D. 1 m
Answer & Explanation
Answer: Option B
Explanation:
1 angstrom = 1.0 x 10-10 meters
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7.
Mesons are found in
A. Laser beam
B. X-rays
C. Gamma rays
D. Cosmic rays
Answer & Explanation
Answer: Option D
Explanation:
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8.
Which radioactive pollutant has recently drawn to public, due to its occurrence in the building material?
A. Thorium B. Radium
C. Plutonium D. Radan
Answer & Explanation
Answer: Option A
Explanation:
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9.
Which of the following shows the masses of the three elementary particles in decreasing order?
A. Leptons, Baryons, Mesons
B. Mesons, Baryons, Leptons
C. Baryons, Mesons, Leptons
D. Leptons, Mesons Baryons
Answer & Explanation
Answer: Option C
Explanation:
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10.
What is the wavelength of visible spectrum?
A. 8500 – 9800 angstrom
B. 7800 – 8000 angstrom
C. 3900 – 7600 angstrom
D. 1300 – 3000 angstrom
Answer & Explanation
Answer: Option C
Explanation:
No answer description available for this question.