Description : Twinkling of stars is due to?
Last Answer : Refraction of light
Description : Who wrote the twinkling of seven stars ?
Last Answer : Written by Jahanara Imam, the twinkling of seven stars.
Description : The twinkling of stars can be partly attributed to (a) intermittent shining (b) convection currents in the atmosphere (c) atmospheric refraction (d) the unstable motion of the earth
Last Answer : Ans:(c)
Description : Which of the following is not caused by atmospheric refraction of light? (1) Sun appearing red at sunset (2) Twinkling of stars at night (3) Sun appearing higher in the sky than it actually is (4) Sun becoming visible two or three minutes before actual sunrise
Last Answer : (3) Sun appearing higher in the sky than it actually is Explanation: The twinkling of stars and variation in size of the Sun are due to atmospheric refraction of light. Besides, refraction is also ... higher or lower in the sky due to the changing position of the Earth relative to the Sun.
Description : What is the reason for twinkling of stars? (1) Dispersion of light (2) Total internal reflection (3) Atmospheric reflection (4) Atmospheric refraction
Last Answer : (4) Atmospheric refraction Explanation: Seismometers are instrument that measures motion of the ground, including those of seismic waves generated by earthquakes, volcanic eruptions and other seismic ... of these different sources. Seismograph is another Greek term meaning to draw siesmo waves.
Description : Stars appear twinkling because of ______ of light. (1) Reflection (2) Scattering (3) Emission (4) Absorption
Last Answer : (2) Scattering Explanation: The stars' light must travel through the Earth's multi-layered atmosphere, and as it does so it is refracted (bent) multiple times and in random directions. The phenomenon of ... star wink as though it is in motion. It is this action that our eyes translate as twinkling.
Description : In which one of the following the phenomenon of total internal reflection of light is used? (1) Formation of mirage (2) Working of binoculars (3) Formation of rainbow (4) Twinkling of stars
Last Answer : (3) Formation of rainbow Explanation: When the angle of incidence is greater than the critical angle, no refraction occurs. Instead, the incident beam is reflected, obeying the Law of Reflection. This ... , Total Internal Reflection occurs at the rear of the raindrop - the water-to-air interface.
Description : Twinkling of stars is caused by ? A. Reflection of light B. Polarization of light C. refraction of light (Answer) D. Interference of light E. None of these
Last Answer : C. refraction of light (Answer)
Description : Twinkling of stars and non-twinkling of planets is accounted for by (a) scattering of light (b) dispersion of light (c) atmospheric refraction (d) none of these
Last Answer : (c) atmospheric refraction
Description : In which one of the following the phenomenon of total internal reflection of light is used ? (1) Formation of mirage (2) Working of binoculars (3) Formation of rainbow (4) Twinkling of stars
Last Answer : Formation of rainbow
Description : Which of the following is not caused by atmospheric refraction of light ? (1) Sun appearing red at sunset (2) Twinkling of stars at night (3) Sun appearing higher in the sky than it actually is (4) Sun becoming visible two or three minutes before actual sunrise
Last Answer : Sun appearing higher in the sky than it actually is
Description : Stars appear twinkling because of ......... of light. (1) Reflection (2) Scattering (3) Emission (4) Absorption
Last Answer : Scattering
Description : What is the reason for twinkling of stars ? (1) Dispersion of light (2) Total internal reflection (3) Atmospheric reflection (4) Atmospheric refraction
Last Answer : Atmospheric refraction
Description : A star appears twinkling in the sky because of – (1) scattering of light by atmosphere (2) reflection of light by atmosphere (3) refraction of light by atmosphere (4) diffraction of light by atmosphere
Last Answer : (3) refraction of light by atmosphere Explanation: A star appears twinkling in the sky because of refraction of light, by atmosphere. Light bends when it passes obliquely from one medium to another. This is called refraction of light.
Description : A star appears twinkling in the sky because of (1) scattering of light by atmosphere (2) reflection of light by atmosphere (3) refraction of light by atmosphere (4) diffraction of light by atmosphere
Last Answer : refraction of light by atmosphere
Description : Stars in the sky appear to twinkle due to – (1) a series of refractions (2) a series of reflections (3) a surface tension phenomenon (4) multiple diminishing brightness
Last Answer : (1) a series of refractions Explanation: The movement of air (sometimes called turbulence) in the atmosphere of Earth causes a series of refractions which makes the starlight to get slightly bent as it ... directly and some gets bent slightly away. To our eyes, this makes the star seem to twinkle.
Description : The different colours of different stars are due to the variation of – (1) temperature (2) pressure (3) density (4) radiation from them
Last Answer : (1) temperature Explanation: Shortly after blackbody radiation was understood, it was noticed that the spectra of stars look extremely similar to blackbody radiation curves of various temperatures, ... and that the colour variation of stars is a direct consequence of their surface temperatures.
Description : Stars in the sky appear to twinkle due to (1) a series of refractions (2) a series of reflections (3) a surface tension phenomenon (4) multiple diminishing brightness
Last Answer : a series of refractions
Description : The different colours of different stars are due to the variation of (1) temperature (2) pressure (3) density (4) radiation from them
Last Answer : temperature