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Important GK Questions:-
- Why dry sand appears bright, while wet sand is bright: – The reason for this is reflection.
- Which one of the mirrors is used to make a periscope :- Plane mirror
- Coolidge-duct is used to produce what :- X rays
- The formation of bright colors in thin soap is the result of which phenomenon :- Multiple reflections and interference
- Which type of mirror is used in automobile to see rear side traffic :- Convex mirror
- Which type of mirror is used in headlights of vehicles :- Parabolic mirror
- Which type of mirror should be used while driving a car to see the traffic behind you :- North Mirror
- How is the image formed on the retina of the human eye :- Real and inverted
- When an object is placed between two parallel plane mirrors, the number of images formed will be :- Infinite
- If a person stands between two plane mirrors which are inclined at 60° angle, then how many images will he see :- 5
- We receive sunlight on the surface of the earth. What type of beam are these light :- Parallel
- Diopter is the unit of :- Power of lens
- Which color has maximum wavelength :- Red
- If there is no atmosphere then what color will the sky be visible from the earth :- Black
- Which part of the photographic camera acts as the retina of the eye :- Film
Important Note :-
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Important GK Questions Pdf
Important GK Questions Pdf Download 27 June 2021