Lambert’s law of radiation on optical base plate
Visible light impinges on a diffusely reflecting surface. The luminance of this surface is determined as a function of the angle of observation.
- study the light intensity that a sheet of paper is diffusely reflecting
- learn about the different physical units associated with light
- very versatile optical base plate
Lens, mounted, f +100 mm
Optical base plate with rubber feet
He/Ne Laser, 5 mW with holder
Magnetic foot for optical base plate
Adjusting support 35 x 35 mm
Surface mirror 30 x 30 mm
Rotational guide rail with angular scale
Lensholder for optical base plate
Diaphragm holder for optical base plate
Photoelement
PHYWE Universal measuring amplifier
Voltmeter, 0.3-300 V DC, 10-300 V AC
Connecting cord, 32 A, 500 mm, red
- The luminous flux emitted reflected by a diffusely reflecting surface is to be determined as a function of the angle of observation.
- Lambert’s law (cos-law) is to be verified using the graph of the measurement values.
- Luminous flux
- Light quantity
- Light intensity
- Illuminance
- Luminance