Physics
Grade-10
Easy
Question
Which of these is not a source of white light?
- Stars
- Moon
- Incandescent light bulb
- Fluorescent light bulb
Hint:
As for artificial sources, fluorescent light bulbs and white LEDs produce white light.
The correct answer is: Incandescent light bulb
As for artificial sources, fluorescent light bulbs and white LEDs produce white light. Other light bulbs, like the incandescent lamp, do not produce white light
Related Questions to study
Physics
What is the color of sunlight?
- Red
- White
- Green
- Yellow
What is the color of sunlight?
PhysicsGrade-10
- Red
- White
- Green
- Yellow
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A rainbow is formed when sunlight is dispersed by _____.
- Prism
- Glass slab
- Olive oil
- Water droplets
A rainbow is formed when sunlight is dispersed by _____.
PhysicsGrade-10
- Prism
- Glass slab
- Olive oil
- Water droplets
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The phenomenon of splitting of white light into its constituent colors is called ______ of light.
- Colors
- Diffraction
- Dispersion
- Refraction
The phenomenon of splitting of white light into its constituent colors is called ______ of light.
PhysicsGrade-10
- Colors
- Diffraction
- Dispersion
- Refraction
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Which of these colors does the white light not have in it?
- Red
- Green
- Blue
- None of the above
Which of these colors does the white light not have in it?
PhysicsGrade-10
- Red
- Green
- Blue
- None of the above
Physics
In which of the following places would you not see the effects of atmospheric refraction?
- Beach
- Jungle
- Underwater
- Outer space
In which of the following places would you not see the effects of atmospheric refraction?
PhysicsGrade-10
- Beach
- Jungle
- Underwater
- Outer space
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Light from air at a temperature of 27 degrees Celsius enters a layer of the atmosphere at 29 degrees Celsius. The light ray ______ on entering the latter.
- Bends away from the normal line
- Bends towards the normal line
- Bends to align itself to the normal line
- Does not bend at all
Light from air at a temperature of 27 degrees Celsius enters a layer of the atmosphere at 29 degrees Celsius. The light ray ______ on entering the latter.
PhysicsGrade-10
- Bends away from the normal line
- Bends towards the normal line
- Bends to align itself to the normal line
- Does not bend at all
Physics
The temperatures at which the various layers of the atmosphere are present are given below in terms of degree Celsius. Identify the layer which has the highest refractive index.
- 12
- 25
- 27
- 30
The temperatures at which the various layers of the atmosphere are present are given below in terms of degree Celsius. Identify the layer which has the highest refractive index.
PhysicsGrade-10
- 12
- 25
- 27
- 30
Physics
The _____ sunrise and _____ sunset is caused due to atmospheric refraction.
- Advanced, delayed
- Delayed, advanced
- Advanced, advanced
- Delayed, delayed
The _____ sunrise and _____ sunset is caused due to atmospheric refraction.
PhysicsGrade-10
- Advanced, delayed
- Delayed, advanced
- Advanced, advanced
- Delayed, delayed
Physics
The temperatures at which the various layers of the atmosphere are present are given below in terms of degree Celsius. Identify the layer which has the lowest refractive index.
- 12
- 25
- 27
- 30
The temperatures at which the various layers of the atmosphere are present are given below in terms of degree Celsius. Identify the layer which has the lowest refractive index.
PhysicsGrade-10
- 12
- 25
- 27
- 30
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When the incandescent bulbs are seen through a turbulent stream of hot air rising above a fire, they appear to be __________.
- Twinkling
- Flickering
- Stable
- Hazy
When the incandescent bulbs are seen through a turbulent stream of hot air rising above a fire, they appear to be __________.
PhysicsGrade-10
- Twinkling
- Flickering
- Stable
- Hazy
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Which of the following is not an effect of atmospheric refraction?
- Advance sunrise
- Twinkling of stars
- Formation of a rainbow
- Delayed sunset
Which of the following is not an effect of atmospheric refraction?
PhysicsGrade-10
- Advance sunrise
- Twinkling of stars
- Formation of a rainbow
- Delayed sunset
Physics
The refractive index of the atmosphere is _____ related to its refractive index.
- Directly
- Indirectly
- Inversely
- Not
The refractive index of the atmosphere is _____ related to its refractive index.
PhysicsGrade-10
- Directly
- Indirectly
- Inversely
- Not
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Planets can be considered as _____ sources of light.
- Point-sized
- Extended
- Yellow
- None of the above
Planets can be considered as _____ sources of light.
PhysicsGrade-10
- Point-sized
- Extended
- Yellow
- None of the above
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When the incandescent bulbs are seen through a turbulent stream of hot air rising above a fire, they appear to be flickering. Why?
- The refractive index of the air above the fire is not stationary
- The temperature of the air above the fire is not stationary
- The physical conditions of the air above the fire are not stationary
- All of the above
When the incandescent bulbs are seen through a turbulent stream of hot air rising above a fire, they appear to be flickering. Why?
PhysicsGrade-10
- The refractive index of the air above the fire is not stationary
- The temperature of the air above the fire is not stationary
- The physical conditions of the air above the fire are not stationary
- All of the above
Physics
The temperatures at which the various layers of the atmosphere are present are given below in terms of degree Celsius. Identify the layer which has the highest refractive index.
- 24
- 18
- 47
- 35
The temperatures at which the various layers of the atmosphere are present are given below in terms of degree Celsius. Identify the layer which has the highest refractive index.
PhysicsGrade-10
- 24
- 18
- 47
- 35
