283590
In case of linearly polarised light, the magnitude of the electric field vector:
1 does not change with time
2 varies periodically with time
3 increases and decreases linearly with time
4 is parallel to the direction of propagation
Explanation:
In any type of light whether polarised or unpolarised, the magnitude of electric field vector always varies periodically with time. Actually the change in electric field vector gives rise to periodically changing magnetic field.
AIIMS-2005
WAVE OPTICS
283596
Which of the following as a dichroic crystal ?
1 Quartz
2 Tourmaline
3 Mica
4 Selenite
Explanation:
: Some crystals such as tourmaline and sheets of iodosulphate of quinine have the property of strongly absorbing the light with vibrations perpendicular to a specific direction (called transmission airs) transmitting the light with vibrations parallel to it. This selective absorption of light is called dichroism.
Karnataka CET-2008
WAVE OPTICS
283598
When unpolarised light beam is incident from air onto glass \((n=1.5)\) at the polarising angle :
1 reflected beam is polarised 100 percent
2 reflected and recracted beams are partially polarised
3 the reason for (a) is that almost all the light is reflected
4 all of the above
Explanation:
: According to Brewster's law when a beam of ordinary light (i.e. unpolarised) is reflected from transparent medium (like glass), the reflected light is completely plane polarised at certain angle of incidence called the angle of polarisation. So, when unpolarised light beam is incident from air onto glass \((n=1.5)\) at the polarising angle reflected beam is polarised 100 percent.
Karnataka CET-2005
WAVE OPTICS
283599
H-polaroid is prepared by :
1 orienting herapathite crystal in the same direction in nitrocellulose
2 using thin tourmaline crystals
3 stretching polyvinyl alcohol and then heated with dehydrating agent
4 stretching polyvinyl alcohol and then impregnating with iodine
Explanation:
: H-polaroid is prepared by stretching a thin sheet of polyvinyl alcohol and then impregnation with iodine. In this process the molecules get oriented in the detraction of the applied strain and the material becomes diachronic each polaroid sheet are mounted between thin glass plates so as to provide mechanical support.
283590
In case of linearly polarised light, the magnitude of the electric field vector:
1 does not change with time
2 varies periodically with time
3 increases and decreases linearly with time
4 is parallel to the direction of propagation
Explanation:
In any type of light whether polarised or unpolarised, the magnitude of electric field vector always varies periodically with time. Actually the change in electric field vector gives rise to periodically changing magnetic field.
AIIMS-2005
WAVE OPTICS
283596
Which of the following as a dichroic crystal ?
1 Quartz
2 Tourmaline
3 Mica
4 Selenite
Explanation:
: Some crystals such as tourmaline and sheets of iodosulphate of quinine have the property of strongly absorbing the light with vibrations perpendicular to a specific direction (called transmission airs) transmitting the light with vibrations parallel to it. This selective absorption of light is called dichroism.
Karnataka CET-2008
WAVE OPTICS
283598
When unpolarised light beam is incident from air onto glass \((n=1.5)\) at the polarising angle :
1 reflected beam is polarised 100 percent
2 reflected and recracted beams are partially polarised
3 the reason for (a) is that almost all the light is reflected
4 all of the above
Explanation:
: According to Brewster's law when a beam of ordinary light (i.e. unpolarised) is reflected from transparent medium (like glass), the reflected light is completely plane polarised at certain angle of incidence called the angle of polarisation. So, when unpolarised light beam is incident from air onto glass \((n=1.5)\) at the polarising angle reflected beam is polarised 100 percent.
Karnataka CET-2005
WAVE OPTICS
283599
H-polaroid is prepared by :
1 orienting herapathite crystal in the same direction in nitrocellulose
2 using thin tourmaline crystals
3 stretching polyvinyl alcohol and then heated with dehydrating agent
4 stretching polyvinyl alcohol and then impregnating with iodine
Explanation:
: H-polaroid is prepared by stretching a thin sheet of polyvinyl alcohol and then impregnation with iodine. In this process the molecules get oriented in the detraction of the applied strain and the material becomes diachronic each polaroid sheet are mounted between thin glass plates so as to provide mechanical support.
283590
In case of linearly polarised light, the magnitude of the electric field vector:
1 does not change with time
2 varies periodically with time
3 increases and decreases linearly with time
4 is parallel to the direction of propagation
Explanation:
In any type of light whether polarised or unpolarised, the magnitude of electric field vector always varies periodically with time. Actually the change in electric field vector gives rise to periodically changing magnetic field.
AIIMS-2005
WAVE OPTICS
283596
Which of the following as a dichroic crystal ?
1 Quartz
2 Tourmaline
3 Mica
4 Selenite
Explanation:
: Some crystals such as tourmaline and sheets of iodosulphate of quinine have the property of strongly absorbing the light with vibrations perpendicular to a specific direction (called transmission airs) transmitting the light with vibrations parallel to it. This selective absorption of light is called dichroism.
Karnataka CET-2008
WAVE OPTICS
283598
When unpolarised light beam is incident from air onto glass \((n=1.5)\) at the polarising angle :
1 reflected beam is polarised 100 percent
2 reflected and recracted beams are partially polarised
3 the reason for (a) is that almost all the light is reflected
4 all of the above
Explanation:
: According to Brewster's law when a beam of ordinary light (i.e. unpolarised) is reflected from transparent medium (like glass), the reflected light is completely plane polarised at certain angle of incidence called the angle of polarisation. So, when unpolarised light beam is incident from air onto glass \((n=1.5)\) at the polarising angle reflected beam is polarised 100 percent.
Karnataka CET-2005
WAVE OPTICS
283599
H-polaroid is prepared by :
1 orienting herapathite crystal in the same direction in nitrocellulose
2 using thin tourmaline crystals
3 stretching polyvinyl alcohol and then heated with dehydrating agent
4 stretching polyvinyl alcohol and then impregnating with iodine
Explanation:
: H-polaroid is prepared by stretching a thin sheet of polyvinyl alcohol and then impregnation with iodine. In this process the molecules get oriented in the detraction of the applied strain and the material becomes diachronic each polaroid sheet are mounted between thin glass plates so as to provide mechanical support.
283590
In case of linearly polarised light, the magnitude of the electric field vector:
1 does not change with time
2 varies periodically with time
3 increases and decreases linearly with time
4 is parallel to the direction of propagation
Explanation:
In any type of light whether polarised or unpolarised, the magnitude of electric field vector always varies periodically with time. Actually the change in electric field vector gives rise to periodically changing magnetic field.
AIIMS-2005
WAVE OPTICS
283596
Which of the following as a dichroic crystal ?
1 Quartz
2 Tourmaline
3 Mica
4 Selenite
Explanation:
: Some crystals such as tourmaline and sheets of iodosulphate of quinine have the property of strongly absorbing the light with vibrations perpendicular to a specific direction (called transmission airs) transmitting the light with vibrations parallel to it. This selective absorption of light is called dichroism.
Karnataka CET-2008
WAVE OPTICS
283598
When unpolarised light beam is incident from air onto glass \((n=1.5)\) at the polarising angle :
1 reflected beam is polarised 100 percent
2 reflected and recracted beams are partially polarised
3 the reason for (a) is that almost all the light is reflected
4 all of the above
Explanation:
: According to Brewster's law when a beam of ordinary light (i.e. unpolarised) is reflected from transparent medium (like glass), the reflected light is completely plane polarised at certain angle of incidence called the angle of polarisation. So, when unpolarised light beam is incident from air onto glass \((n=1.5)\) at the polarising angle reflected beam is polarised 100 percent.
Karnataka CET-2005
WAVE OPTICS
283599
H-polaroid is prepared by :
1 orienting herapathite crystal in the same direction in nitrocellulose
2 using thin tourmaline crystals
3 stretching polyvinyl alcohol and then heated with dehydrating agent
4 stretching polyvinyl alcohol and then impregnating with iodine
Explanation:
: H-polaroid is prepared by stretching a thin sheet of polyvinyl alcohol and then impregnation with iodine. In this process the molecules get oriented in the detraction of the applied strain and the material becomes diachronic each polaroid sheet are mounted between thin glass plates so as to provide mechanical support.
