A. Jena Glass
B. Soda Glass
C. Pyrex Glass
D. Crookes Glass
Submitted by: Parvez Malik
Crookes glass is a kind of glass which contains mainly cerium oxide and silica. The cerium oxide can sharply absorb the harmful UV rays coming from the sun.
Related Mcqs:
- In hydrogen spectrum which one of the following series lies in the ultraviolet region ?
A. Balmer series
B. Pfund series
C. Bracket series
D. Lymann series - _________ is the atmospheric layer that absorbs most of the ultraviolet radiation that Earth receives from the Sun.
A. Troposphere
B. Stratosphere
C. Mesosphere
D. IonosphereSubmitted by: Muhammad Abdullah
- Which of the following Rays are more Penetrating?
A. Beta rays
B. Alpha rays
C. Gamma rays
D. X-raysSubmitted by: Farjan Ahmed Soomro
- Which of the following will be a better shield against gamma rays ?
A. Ordinary water
B. Heavy water
C. Lead
D. Aluminum - Which rays are trapped in our galaxy by magnetic waves?
A. Alpha rays
B. Gamma rays
C. Cosmic rays
D. None of theseSubmitted by: Malik Asghar Hussain
- The light rays used for eliminating bacteria?
A. X-rays
B. infrared rays
C. microwave radiation
D. ultra-violet radiationSubmitted by: Malik Asghar Hussain
- X-rays are similar in nature to_______________?
A. Cathode rays
B. Positive rays
C. γ-rays
D. Beta rays - When X-rays are passed through successive aluminum sheets what happens to their thickness ?
A. increases
B. it decreases
C. it remains same
D. sometimes increases and sometimes decreases - The characteristic X-rays spectrum is due to_____________?
A. The illumination of the target metal by ultra-violet radiation
B. The bombardment of the target by protons
C. The bombardment of target by electrons
D. The absorption of radiation by the target metal - The minimum wavelength of X-rays produced by the bombardment of electrons on the screen of a television set where the accelerating potential is 2.0K V will be______________?
A. 6.2 x 10-10m
B. 9.1 x 10-18m
C. 3.11 x 10-10m
D. 4 x 10-10m
Mcq Added by: Parvez Malik