Candela is the unit of
Luminous intensity
None of the above.
Wavelength
Luminous flux
Luminous intensity
The unit of luminous flux is
lumen
candela
steradian
lux.
lumen
The illumination is directly proportional to the cosine of the angle made by the normal to the illuminated surface with the direction of the incident flux. Above statement is associated with
Bunsens law of illumination
Lamberts cosine law.
Plancks law
Macbeths law of illumination
Lamberts cosine law.
Melting temperature of tungsten is
3655°K.
2000°K
2500°K
2655°K
3655°K.
Illumination level required for precision work is around
200 lm/m2
100 lm/m2
50 lm/m2
500 lm/m2.
500 lm/m2.
Which photometer depends for its operation on Inverse Square Law ?
Guilds Flicker Photometer
Lummer Brodhun Photometer
Macbeth illuminometer
Trotter Illumination Photometer.
Macbeth illuminometer
The color temperature of day light is around
6000 K.
600 K
160 K
50 K
6000 K.
Light is produced in electric discharge lamps by
ionization in a gas or vapor
magnetic effect of current
heating effect of current
carbon electrodes.
ionization in a gas or vapor
Lumen/watt is the unit of
Brightness
Luminous efficiency.
Light flux
Luminous intensity
Luminous efficiency.
Candela is-the unit for
Luminous intensity
Light flux
Brightness
Luminous efficiency.
Luminous intensity
पोस्ट अच्छी लगी हो तो प्लीज नीचे दिए गए लिंक पर क्लिक कर शेयर जरुर करें
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