light, heat, thermodynamics, wave motion, sound, optics & oscillations - Category wise Question and Answer Practice Test with Solutions
light, heat, thermodynamics, wave motion, sound, optics & oscillations PRACTICE TEST [16 - EXERCISES]
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Question : 16 [IAS (Pre) 1993]
The formation of glittering colours in thin foam of soap is the result of which of the following phenomenon?
a) Diffraction and dispersion
b) Total refraction and dispersion
c) Total reflection and interference
d) Polarization and interference
Answer »Answer: (c)
Question : 17 [PSC (Pre) 2019]
When a person enters into a dark room from the strong light area, he is not able to see clearly for some time. Later he gradually begins to see things. This is because
a) Bleaching and reformation of Rhodopsins
b) Changes in the diameter and focal length of lens
c) Changes in the size of pupil
d) Eyes become familiar with darkness in course of time
Answer »Answer: (d)
Question : 19
A spherical air bubble is embedded in a piece of glass. For a ray of light passing through the bubble, it behaves like a
a) plano-converging lens
b) converging lens
c) diverging lens
d) plano-diverging lens
Answer »Answer: (c)
Bubble will behave as diverging lens because refrective index of air is less than that of a glass.
Question : 20
Dispersion is the term used to describe
a) the bending of a beam of light when it strikes a mirror
b) the propagation of light in straight lines
c) the splitting of a beam of light into component colours
d) the change that takes place in white light after passage through red glass
Answer »Answer: (c)
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set 12 Online Quiz
Click to Start..general science mcq CATEGORIES
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» Measurement And SI Units
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» Measuring Devices And Scales
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» Mechanics (Mass, Force, Acceleration, Work, Energy, Momentum, Velocity)
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» Force Of Gravity, Solids And Fluids
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» Motion Under Gravity
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» Physical Properties Of Materials
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» Light, Heat, Thermodynamics, Wave Motion, Sound, Optics & Oscillations
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» Electric Current And Magnetism
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» Nuclear Physics And Conductivity
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» Modern And Space Physics, Sources Of Energy
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» General Concepts Of Chemistry
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» Nature Of Matter And Composition
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» Atomic Structure Molecules And Nuclear Chemistry
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» Classification Of Elements, Chemical Bonding, Periodicity In Properties & Physical Transformation
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» Metals, Non Metals, Minerals, Ores, Properties, Uses
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» Alloys, Carbon & Its Various Forms, Hydrogen & Compounds, Sulphur, Nitrogen, Halogen & Inert Gases
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» Acids, Bases, Salts And Metals
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» Hydrocarbon, Alcohol, Polymer, Organic Acid And Explosive Substance
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» Fuel, Food Preservation, Nutrition, Medicine, Detergents And Fertilizers
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» Inorganic Chemistry
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» Organic Chemistry
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» Environmental Chemistry
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» Some Important Man Made Materials
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» Sub Divisions Of Biology
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» Genetics, Evolution Of Life & Ecological Biodiversity
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» Taxonomy
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» Heredity
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» Biofertilizer
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» Biological Classification Cell Tissues And Division
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» Human Anatomy
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» Blood Transport System
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» Digestion And Excretion
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» Photosynthesis
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» Vitamins, Nutrition, Health, Disease And Treatment
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» Endocrine Glands, Hormones
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» Physiology Of Plants, Humans And Animals
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» Reproduction
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» Genetic Engineering And Bio Technology
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