UPSC Civil Service Prelims Paper I 2021 (General Studies) | Space Question 4 | Science and Technology

Science and Technology

Basic Biology

Chemistry

Physics

Biotechnology

Nanotechnology

Space

Disease

Electronics and Communication

Defence

Miscellaneous

UPSC Civil Service Prelims Paper I 2021 (General Studies)

MCQ (Single Correct Answer)

-0.66

Which one of the following is a reason why astronomical distances are measured in light-years?

Distances among stellar bodies do not change

Gravity of stellar bodies does not change

Light always travels in straight line

Speed of light is always same

Questions Asked from Marks 2

UPSC Civil Service Subjects

History of India

Science and Technology

Geography

Ecology and Environment

Indian Polity and Governance

Economy

Current Affairs

Comprehension

Basic Numeracy

Logical Reasoning and General Mental Ability

Data Interpretation and Sufficiency