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You Are On Question Answer Bank SET 2020
101001. Irregular and partial reflection of light during its passing through a medium is known as?
Answer: Scattering
101002. The colour produced by the mixing of green and red is?
Answer: Yellow
101003. A green leaf appears green because?
Answer: it reflects green colour
101004. The beautiful colour of the soap foam and oil spread water is due to?
Answer: interference of light
101005. How does a green leaf appears when it is viewed in a blue light?
Answer: Dark
101006. The colour used in signal lamp is?
Answer: Red
101007. The colour of the head lamp in motor vehicles is?
Answer: Yellow
101008. The heat carried in the solar rays is?
Answer: Infrared radiation
101009. Sun burn is caused by which radiation?
Answer: Ultraviolet
101010. At a place when green, red and blue rays overlap, which colour will be seen?
Answer: White
101011. The distribution of the component colours of a composite light in the order of their wavelength or frequency as a result of dispersion is called?
Answer: Spectrum
101012. When wavelength increases the rate of scattering?
Answer: Decreases
101013. The property of certain material by virtue of which they absorb light of shorter wavelength and emit light of longer wavelength is called?
Answer: Fluorescence
101014. Why can we see pictures with natural effect on a television?
Answer: Due to persistance of vision
101015. The colour of light obtained by mixing of any two primary colour of light is?
Answer: Secondary colour
101016. Whose theory is called the Quantum theory of light?
Answer: Max Planck’s theory
101017. Why lightning is observed earlier than the thunder is heard?
Answer: Because light travels faster than sound
101018. A photoelectric cell converts?
Answer: Light energy into electric energy
101019. Tyndall effect is due to?
Answer: Brownian Motion
101020. If a surface absorbs all colours, it sees as?
Answer: Black
101021. If a surface reflects all colours, it sees as?
Answer: White
101022. Mirage is formed by?
Answer: Refraction and total internal reflection
101023. Why is the sky and sea blue in colour?
Answer: Due to the scattering of light
101024. The formation of rainbow is due to which phenomenon of light?
Answer: Refraction and dispersion
101025. The colour seen on the outer edge of the rainbow is?
Answer: Red
101026. Which colour is obtained when blue light and green light of the same intensities are mixed together?
Answer: Cyan
101027. The rays which appears to originate outside the earth?
Answer: the cosmic rays
101028. In a doctor’s stethescope the sound is intensified because of?
Answer: reflection of sound
101029. When sunlight passes through atmosphere, the colour which scatters most is?
Answer: Violet
101030. What is called interference?
Answer: The modification of intensity in the region of superimposition.
101031. Who suggested the wave theory of light?
Answer: Christian Huygens
101032. What is the name of the scientist who suggested that the velocity of light is maximum while propagating through vacuum?
Answer: Focault
101033. The intensity of light depends on?
Answer: Amplitude
101034. What is the reason for the formation if beautiful colours on a soap bubble or on a thin film of oil when spread over water?
Answer: Interference
101035. Who put forward the theory of electromagnetic radiation?
Answer: Maxwell
101036. Who discovered the photoelectric effect?
Answer: Heinrich Hertz
101037. What is the velocity of light in vacuum?
Answer: 3 × 108 m/sec.
101038. Bending or spreading of light around tiny opaque objects are called?
Answer: Diffraction
101039. Which always reduces the velocity of electromagnetic waves?
Answer: Medium
101040. The unit of electromagnetic radiants having a certain wavelength and a definite amount of energy is?
Answer: Photon
101041. What is directly proportional to the energy of a photon?
Answer: Frequency
101042. Shadows have fuzzy uneven edges because of?
Answer: Diffraction
101043. കേരളം സംസ്ഥാനം നിലവിൽ വന്നത് ? [Keralam samsthaanam nilavil vannathu ?]
Answer: 1956 നവംബർ 1 [1956 navambar 1]
101044. കേരള തലസ്ഥാനം ഏത് ? [Kerala thalasthaanam ethu ?]
Answer: തിരുവനന്തപുരം [Thiruvananthapuram]
101045. കേരളത്തിന്റെ വിസ്തീർണ്ണം എത്ര ? [Keralatthinte vistheernnam ethra ?]
Answer: 38863 ചതുരശ്ര . കി . മീ [38863 chathurashra . Ki . Mee]
101046. കേരളത്തിലെ കേരളത്തിന്റെ ജനസംഖ്യ എത്ര ? [Keralatthile keralatthinte janasamkhya ethra ?]
Answer: 3,33,87,677
101047. കേരളത്തിലെ റവന്യു ഡിവിഷൻ എത്ര ? [Keralatthile ravanyu divishan ethra ?]
Answer: 21
101048. കേരളത്തിലെ താലൂക്കുകൾ എത്ര ? [Keralatthile thaalookkukal ethra ?]
Answer: 75
101049. കേരളത്തിലെ ബ്ലോക്ക് പഞ്ചായത്ത് എത്ര ? [Keralatthile blokku panchaayatthu ethra ?]
Answer: 152
101050. കേരളത്തിലെ ഗ്രാമ പഞ്ചായത്ത് എത്ര ? [Keralatthile graama panchaayatthu ethra ?]
Answer: 941
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