283471
A very thin film that reflects white light appears
1 coloured
2 white
3 black
4 red
Explanation:
: For a very thin film the path difference is the same as that of destructive interference. Due to destructive interference, the colour of a very thin film when reflected appears to be black.
J and K CET- 2005
WAVE OPTICS
283464
The principle of superposition is basic to the phenomenon of
1 total internal reflection
2 interference
3 reflection
4 refraction
5 Polarisation
Explanation:
: The principle of superposition is basic to the phenomenon of interference.
Kerala CEE - 2010
WAVE OPTICS
283472
In the phenomenon of interference, energy is
1 destroyed at bright fringes
2 created at dark fringes
3 conserved but it is redistributed
4 same at all points
Explanation:
: In interference pattern we can see that resultant amplitude of superimposed wave depends on the phase difference of waves so it varies from maximum to minimum amplitude by redistributing of energy but total energy remains conserved.
Manipal UGET-2013
WAVE OPTICS
283473
The beats are the examples of
1 simple harmonic motion
2 interference of two or more waves having same amplitude but slightly different frequencies in the same direction
3 interference of two or more waves having different amplitude but same frequencies in the same direction
4 interference of two or more waves having same amplitude but slightly different frequencies in the perpendicular direction
Explanation:
: When two sound waves having equal amplitude but of slightly different frequencies travel in a medium in the same direction and arrive at a point simultaneously, they interfere and we hear alternate maxima and minima in the resultant intensity of sound.
J and K-CET-2013
WAVE OPTICS
283476
Fresnel diffraction is produced due to light rays falling on a small obstacle. The intensity of light at a point on a screen beyond an obstacle depends on
1 The focal length of lens used for observation
2 The number of half-period zones that superpose at the point
3 The square of the sum of the number of half period zones
4 The thickness of the obstacle
Explanation:
: In Fresnel diffraction, no lenses are required for bending light rays parallel and also the diffraction pattern may be dark or bright depending upon the number of half-period zones that superpose at the point. Hence the intensity of light at a point a screen beyond or obstacle depends on the number of half periods zones that superimpose at the point.
283471
A very thin film that reflects white light appears
1 coloured
2 white
3 black
4 red
Explanation:
: For a very thin film the path difference is the same as that of destructive interference. Due to destructive interference, the colour of a very thin film when reflected appears to be black.
J and K CET- 2005
WAVE OPTICS
283464
The principle of superposition is basic to the phenomenon of
1 total internal reflection
2 interference
3 reflection
4 refraction
5 Polarisation
Explanation:
: The principle of superposition is basic to the phenomenon of interference.
Kerala CEE - 2010
WAVE OPTICS
283472
In the phenomenon of interference, energy is
1 destroyed at bright fringes
2 created at dark fringes
3 conserved but it is redistributed
4 same at all points
Explanation:
: In interference pattern we can see that resultant amplitude of superimposed wave depends on the phase difference of waves so it varies from maximum to minimum amplitude by redistributing of energy but total energy remains conserved.
Manipal UGET-2013
WAVE OPTICS
283473
The beats are the examples of
1 simple harmonic motion
2 interference of two or more waves having same amplitude but slightly different frequencies in the same direction
3 interference of two or more waves having different amplitude but same frequencies in the same direction
4 interference of two or more waves having same amplitude but slightly different frequencies in the perpendicular direction
Explanation:
: When two sound waves having equal amplitude but of slightly different frequencies travel in a medium in the same direction and arrive at a point simultaneously, they interfere and we hear alternate maxima and minima in the resultant intensity of sound.
J and K-CET-2013
WAVE OPTICS
283476
Fresnel diffraction is produced due to light rays falling on a small obstacle. The intensity of light at a point on a screen beyond an obstacle depends on
1 The focal length of lens used for observation
2 The number of half-period zones that superpose at the point
3 The square of the sum of the number of half period zones
4 The thickness of the obstacle
Explanation:
: In Fresnel diffraction, no lenses are required for bending light rays parallel and also the diffraction pattern may be dark or bright depending upon the number of half-period zones that superpose at the point. Hence the intensity of light at a point a screen beyond or obstacle depends on the number of half periods zones that superimpose at the point.
283471
A very thin film that reflects white light appears
1 coloured
2 white
3 black
4 red
Explanation:
: For a very thin film the path difference is the same as that of destructive interference. Due to destructive interference, the colour of a very thin film when reflected appears to be black.
J and K CET- 2005
WAVE OPTICS
283464
The principle of superposition is basic to the phenomenon of
1 total internal reflection
2 interference
3 reflection
4 refraction
5 Polarisation
Explanation:
: The principle of superposition is basic to the phenomenon of interference.
Kerala CEE - 2010
WAVE OPTICS
283472
In the phenomenon of interference, energy is
1 destroyed at bright fringes
2 created at dark fringes
3 conserved but it is redistributed
4 same at all points
Explanation:
: In interference pattern we can see that resultant amplitude of superimposed wave depends on the phase difference of waves so it varies from maximum to minimum amplitude by redistributing of energy but total energy remains conserved.
Manipal UGET-2013
WAVE OPTICS
283473
The beats are the examples of
1 simple harmonic motion
2 interference of two or more waves having same amplitude but slightly different frequencies in the same direction
3 interference of two or more waves having different amplitude but same frequencies in the same direction
4 interference of two or more waves having same amplitude but slightly different frequencies in the perpendicular direction
Explanation:
: When two sound waves having equal amplitude but of slightly different frequencies travel in a medium in the same direction and arrive at a point simultaneously, they interfere and we hear alternate maxima and minima in the resultant intensity of sound.
J and K-CET-2013
WAVE OPTICS
283476
Fresnel diffraction is produced due to light rays falling on a small obstacle. The intensity of light at a point on a screen beyond an obstacle depends on
1 The focal length of lens used for observation
2 The number of half-period zones that superpose at the point
3 The square of the sum of the number of half period zones
4 The thickness of the obstacle
Explanation:
: In Fresnel diffraction, no lenses are required for bending light rays parallel and also the diffraction pattern may be dark or bright depending upon the number of half-period zones that superpose at the point. Hence the intensity of light at a point a screen beyond or obstacle depends on the number of half periods zones that superimpose at the point.
283471
A very thin film that reflects white light appears
1 coloured
2 white
3 black
4 red
Explanation:
: For a very thin film the path difference is the same as that of destructive interference. Due to destructive interference, the colour of a very thin film when reflected appears to be black.
J and K CET- 2005
WAVE OPTICS
283464
The principle of superposition is basic to the phenomenon of
1 total internal reflection
2 interference
3 reflection
4 refraction
5 Polarisation
Explanation:
: The principle of superposition is basic to the phenomenon of interference.
Kerala CEE - 2010
WAVE OPTICS
283472
In the phenomenon of interference, energy is
1 destroyed at bright fringes
2 created at dark fringes
3 conserved but it is redistributed
4 same at all points
Explanation:
: In interference pattern we can see that resultant amplitude of superimposed wave depends on the phase difference of waves so it varies from maximum to minimum amplitude by redistributing of energy but total energy remains conserved.
Manipal UGET-2013
WAVE OPTICS
283473
The beats are the examples of
1 simple harmonic motion
2 interference of two or more waves having same amplitude but slightly different frequencies in the same direction
3 interference of two or more waves having different amplitude but same frequencies in the same direction
4 interference of two or more waves having same amplitude but slightly different frequencies in the perpendicular direction
Explanation:
: When two sound waves having equal amplitude but of slightly different frequencies travel in a medium in the same direction and arrive at a point simultaneously, they interfere and we hear alternate maxima and minima in the resultant intensity of sound.
J and K-CET-2013
WAVE OPTICS
283476
Fresnel diffraction is produced due to light rays falling on a small obstacle. The intensity of light at a point on a screen beyond an obstacle depends on
1 The focal length of lens used for observation
2 The number of half-period zones that superpose at the point
3 The square of the sum of the number of half period zones
4 The thickness of the obstacle
Explanation:
: In Fresnel diffraction, no lenses are required for bending light rays parallel and also the diffraction pattern may be dark or bright depending upon the number of half-period zones that superpose at the point. Hence the intensity of light at a point a screen beyond or obstacle depends on the number of half periods zones that superimpose at the point.
283471
A very thin film that reflects white light appears
1 coloured
2 white
3 black
4 red
Explanation:
: For a very thin film the path difference is the same as that of destructive interference. Due to destructive interference, the colour of a very thin film when reflected appears to be black.
J and K CET- 2005
WAVE OPTICS
283464
The principle of superposition is basic to the phenomenon of
1 total internal reflection
2 interference
3 reflection
4 refraction
5 Polarisation
Explanation:
: The principle of superposition is basic to the phenomenon of interference.
Kerala CEE - 2010
WAVE OPTICS
283472
In the phenomenon of interference, energy is
1 destroyed at bright fringes
2 created at dark fringes
3 conserved but it is redistributed
4 same at all points
Explanation:
: In interference pattern we can see that resultant amplitude of superimposed wave depends on the phase difference of waves so it varies from maximum to minimum amplitude by redistributing of energy but total energy remains conserved.
Manipal UGET-2013
WAVE OPTICS
283473
The beats are the examples of
1 simple harmonic motion
2 interference of two or more waves having same amplitude but slightly different frequencies in the same direction
3 interference of two or more waves having different amplitude but same frequencies in the same direction
4 interference of two or more waves having same amplitude but slightly different frequencies in the perpendicular direction
Explanation:
: When two sound waves having equal amplitude but of slightly different frequencies travel in a medium in the same direction and arrive at a point simultaneously, they interfere and we hear alternate maxima and minima in the resultant intensity of sound.
J and K-CET-2013
WAVE OPTICS
283476
Fresnel diffraction is produced due to light rays falling on a small obstacle. The intensity of light at a point on a screen beyond an obstacle depends on
1 The focal length of lens used for observation
2 The number of half-period zones that superpose at the point
3 The square of the sum of the number of half period zones
4 The thickness of the obstacle
Explanation:
: In Fresnel diffraction, no lenses are required for bending light rays parallel and also the diffraction pattern may be dark or bright depending upon the number of half-period zones that superpose at the point. Hence the intensity of light at a point a screen beyond or obstacle depends on the number of half periods zones that superimpose at the point.
