Photometry MCQ Questions and Answers. We covered all the Photometry MCQ Questions and Answers in this post so that you can practice well for the exam.
Install our MCQTUBE Android app from the Google Play Store and prepare for any competitive government exams for free.
We also covered some other related topics like light and heat MCQ on our website. The respective links of those posts are provided in the related posts section below.
Related Posts:
MCQ on Photometry for School Students
The luminous flux cannot be measured visually in
1. Ergs/ second
2. Lumen
3. Lumen/watt
4. None of these
Option 1 – Ergs/ second
The luminous flux or illuminating power cannot be measured visually in ergs/second Because of
1. The variations of the sensitivity of human eye to different colours of light
2. The constant in the sensitivity of human eye to different colours of light
3. The variations of the sensitivity of human eye to same colour of light
4. None of these
Option 1 – The variations of the sensitivity of human eye to different colours of light
When normal lines are drawn from the boundary of a portion on the surface of a sphere such that the lines meet at its centre and form a cone, then the angle enclosed by the conical surface is defined as
1. The angle in a semi circle
2. The angle in a major segment
3. Solid angle
4. The angle in a minor segment
Option 3 – Solid angle
The solid angle is equal to the
1. Ratio of the area of the base of conical surface to the square of the radius of the sphere
2. Sum of the area of the base of conical surface and the square of the radius of the sphere
3. Difference of the area of the base of conical surface to the square of the radius of the sphere.
4. None of these
Option 1 – Ratio of the area of the base of conical surface to the square of the radius of the sphere
The light from a point source, like a candle flame, travels in the form of
1. Cylindrical wave fronts
2. Spherical wave fronts
3. Plane wave fronts
4. None of these
Option 2 – Spherical wave fronts
Solid angle is measured in
1. Radians
2. Steradians
3. Degrees
4. Minutes
Option 2 – Steradians
The solid angle made at the centre(s) of a sphere of radius 1 unit by an areas (A) of 1 sq. unit on its surface, is
1. 1 steradian
2. 2 steradians
3. 3 steradians
4. 4 steradians
Option 1 – 1 steradian
The intensity of a light source that can be judged by human eye, is
1. Luminosity
2. Luminous intensity
3. Illuminating power
4. 2 and 3
Option 4 – 2 and 3
The Luminous flux emitted from a point source of light through unit solid angle, is
1. Luminous intensity
2. Illuminating power
3. Luminosity
4. 1 and 2
Option 4 – 1 and 2
The unit of luminous intensity ‘or’ illuminating power is
1. Lumen
2. Candela
3. Lumen/watt
4. None of these
Option 2 – Candela
The S.I. unit of luminous intensity is
1. Candela
2. Lumen
3. Lumen/watt
4. Erg/sec
Option 1 – Candela
A black-body is a perfect
1. Emitter
2. Absorber
3. Both of these
4. None of these
Option 3 – Both of these
The luminous flux emitted per unit solid angle along normal to the surface by one sixtieth () square-cm area of a black-body radiator is defined as
1. Lumen
2. Ergs/sec
3. Candela
4. Lumen/watt
Option 3 – Candela
The luminous flux of a light source is measured in the units of
1. Lumen
2. Candela
3. Lumen/watt
4. Ergs/sec
Option 1 – Lumen
The amount of light energy emitted per second by a uniform source of one candela within a cone of unit solid angle is
1. Candela
2. Lumen
3. Ergs/sec
4. Luminosity
Option 2 – Lumen
Which of the following is constant for given a light source?
1. Luminous intensity
2. Luminosity
3. Luminous
4. All of these
Option 1 – Luminous intensity
Which of the following is not measured visually in ergs per second
1. Luminous flux
2. Luminous intensity
3. Luminosity
4. 1 and 2
Option 4 – 1 and 2
Light is a/an
1. At rest
2. Energy on the flow
3. Material that flow
4. Material at rest
Option 2 – Energy on the flow
Light is emanated from
1. Non-luminous bodies
2. Self luminous bodies
3. Any body
4. All of these
Option 2 – Self luminous bodies
The radiant energy which causes sensation of vision of the retina of human eye, is called
1. Light
2. Sound
3. Heat
4. Electricity
Option 1 – Light
The term ‘light’, includes the…..of electromagnetic energy spectrum
1. Infrared region
2. Visible region
3. Ultra violet region
4. None of these
Option 2 – Visible region
A source of light may emit radiant energy from region of the spectrum. …….
1. Visible
2. Infrared
3. Violet
4. All of these
Option 4 – All of these
Which of the following of a light source represents the degree to which visible light is present in the radiant energy emitted by the source?
1. Brightness
2. Luminous intensity
3. (1) and (2)
4. None of these
Option 3 – (1) and (2)
The amount of radiant energy flowing from a source of light per unit time, is
1. Luminosity
2. Luminous flux
3. Luminous intensity
4. None of these
Option 3 – Luminous intensity
The science with which the relative luminous intensities of light emitted by two sources of light are determined, is :
1. Photometry
2. Visible spectroscopy
3. Visile Photometry
4. All of these
Option 3 – Visile Photometry
The science of measuring brightness or relative luminous intensities of light emitted by different sources using certain standards and techniques
1. Visible spectrum
2. Photometer
3. Visual photometry
4. None of these
Option 2 – Photometer
The amount of radiant energy which is expressed in ergs per second, flowing from a source of light per unit time is called
1. Luminous flux
2. Light flux
3. Luminosity
4. (1) and (2)
Option 4 – (1) and (2)
The luminous flux or the light flux depends on
1. Luminosity
2. Illuminating power
3. Luminous intensity
4. 2 and 3
Option 4 – 2 and 3
We covered all the photometry MCQ questions and answers above in this post for free so that you can practice well for the exam.
Check out the latest MCQ content by visiting our mcqtube website homepage.
