Stay Tuned with Daily Current Affairs Newspaper Quiz for UPSC 2026
Question 1
Geography | Rayleigh Scattering | Medium | The Hindu
SOURCE
Identify the correct statement with respect to Rayleigh scattering:
A. shorter wavelengths are scattered more intensely than longer wavelengths
B. Sunlight interacts with tiny nitrogen and oxygen molecules in the Earth’s atmosphere.
C. Violet light is scattered more and the sun emits less violet light.
D. All of the above
Solution & Detailed Explanation
Answer: (D) All of the above
Detailed Explanation
- Rayleigh scattering is the scattering of electromagnetic radiation, including visible light, by particles significantly smaller than the wavelength of the incident light. This phenomenon causes optical effects, such as the blue appearance of the sky during the day and the reddish-orange hues at sunrise and sunset.
- Wavelength Dependence: The intensity of Rayleigh scattering is inversely proportional to the fourth power of the light’s wavelength (I ∝ 1/λ^4).This means shorter wavelengths, like blue and violet, are scattered more intensely than longer wavelengths, such as red and orange.
- Atmospheric Effect: Sunlight interacts with tiny nitrogen and oxygen molecules in the Earth’s atmosphere. These molecules scatter shorter blue and violet wavelengths in all directions. The widespread scattering of blue light makes the sky appear blue. Although violet light is scattered more, the human eye is more sensitive to blue, and the sun emits less violet light, resulting in the perception of a blue rather than violet sky.
- Sunrise and Sunset: During sunrise and sunset, sunlight travels through a greater portion of the atmosphere. This longer path results in more of the shorter blue and violet wavelengths being scattered away. Longer wavelengths, such as red, orange, and yellow, are less affected and are more likely to reach the observer, causing the sky and sun to appear red, orange, or pink.
- Other Examples: Rayleigh scattering is observed in other phenomena beyond the atmosphere, including:
- Opalescent glass: This glass shows blue scattering when viewed from the side and orange when light passes through it.
- Blue eyes: The blue color in eyes is partly due to Rayleigh scattering by collagen fibers in the iris.
- Nanoparticles: Rayleigh scattering is used to analyze scattering patterns and detect emissions from industrial exhausts.
- Distinction from Mie Scattering:
- Rayleigh scattering differs from Mie scattering:
- Rayleigh scattering occurs with particles much smaller than the light’s wavelength.
- Mie scattering happens when particles are similar in size to or larger than the wavelength.
- Mie scattering causes the white appearance of clouds, fog, and mist because larger water droplets scatter all visible wavelengths nearly equally according to Hyper Physics.
Question 2
International Relations | Maritime Exercises | Medium | The Hindu
SOURCE
Consider the following pairs
KAKADU – Australia
VARUNA – France
IMCOR – Myanmar
How many pairs is or are correctly matched?
A. Only one
B. Only two
C. All three
D. None of the Above
Solution & Detailed Explanation
Answer: (C) All three
Detailed Explanation
Question 3
Current Affairs | Legislations | Hard | The Hindu
SOURCE
Which statement is correct with respect to Manipur Goods and Services Tax (Amendment) Bill, 2025:
A. It seeks to replace the Manipur Goods and Services Tax (Amendment) Ordinance, 2020.
B. Alcoholic liquor for human consumption is exempt from levy of SGST along with rectified spirit.
C. The Bill empowers the Central government to waive recovery of SGST.
D. Schedule I of the Act specifies a list of activities that are not considered as supply of goods and services and hence exempted from levy of SGST.
Solution & Detailed Explanation
Answer: (B) Alcoholic liquor for human consumption is exempt from levy of SGST along with rectified spirit.
Detailed Explanation
Question 4
Current Affairs | Sports Legislation | Hard | The Hindu
SOURCE
Choose the correct option with respect to National Sports Governance Bill, 2025:
A. The central government will establish a national panel of electoral officers to oversee elections of national sports bodies.
B. The Bill provides for constituting a National Sports Tribunal consisting of three members.
C. Establishment of National and Regional Sports Federations for each designated sport.
D. All of the Above
Solution & Detailed Explanation
Answer: (D) All of the Above
Detailed Explanation
Question 5
Governance | Schemes | Easy | The Hindu
SOURCE
Consider the following:
1. MNREGA promotes a bottom-up approach.
2. MNREGA focuses on providing wage employment through unskilled manual work.
Which of the statements above is or are correct?
A. 1 only
B. 2 only
C. Both 1 and 2
D. None of the above
Solution & Detailed Explanation
Answer: (C) Both 1 and 2
Detailed Explanation
- The scheme promotes a bottom-up approach to planning and execution, empowering local communities to participate in development.
- The Mahatma Gandhi National Rural Employment Guarantee Act (MGNREGA)is an Indian labor law and social security scheme that aims to guarantee the “right to work” by providing at least 100 days of wage employment in a financial year to every rural household whose adult members volunteer to do unskilled manual work. Enacted in 2005, it is monitored by the Ministry of Rural Development (MRD) and aims to enhance livelihood security in rural areas.
Question 6
Environment | International Treaty for Plastics | Medium | The Hindu
SOURCE
Which of the following statement is correct:
A. The Global Plastic Action Partnership (GPAP) is the World Economic Forum’s platform
B. The Global Plastics Treaty is a proposed legally binding international agreement
C. The second part of its fifth session (INC-5. 2) is taking place in Geneva, Switzerland, from August 5-14, 2025.
D. All of the Above
Solution & Detailed Explanation
Answer: (D) All of the Above
Detailed Explanation
