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Environmental Physics MCQs

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1. : Which radiation is mainly responsible for the greenhouse effect?





2. : The average solar constant at Earth’s atmosphere is approximately:





3. : The albedo of Earth represents:





4. : Which layer of the atmosphere absorbs most of the UV radiation?





5. : Wien’s displacement law relates:





6. : Which gas is the most effective absorber of longwave radiation?





7. : The greenhouse effect is an example of:





8. : The unit of radiant flux density is:





9. : The main cause of seasons on Earth is:





10. : Which process is responsible for the blue color of the sky?





11. : Which type of radiation has the shortest wavelength?





12. : The Stefan–Boltzmann law is expressed as:





13. : What percentage of incoming solar energy is absorbed by Earth’s surface?





14. : The greenhouse gases trap heat mainly in which part of the spectrum?





15. : Which gas is not a greenhouse gas?





16. : The “ozone hole” problem is maximum over which region?





17. : Which phenomenon explains why the Sun looks red during sunset?





18. : The heat transfer from Sun to Earth takes place by:





19. : The main contributor of anthropogenic greenhouse effect is:





20. : Which parameter measures the ability of a surface to emit radiation?





21. : Which gas absorbs both UV and IR radiation?





22. : What is the average temperature of Earth’s surface (approx.)?





23. : In the absence of greenhouse effect, Earth’s average surface temperature would be:





24. : The fraction of sunlight reflected by Earth’s surface is called:





25. : Which law is used to calculate the wavelength of maximum emission of a black body?





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