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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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