Colour Perception - Lab Report Example

Other (s) SARC 122 Colour Perception Module Assignments Question a. Color temperature as a concept refers to a characterization or measure of a light’s spectral properties/color (in Kelvin “K”). High color temperature light source usually implies colder( blue light) while low color temperature denotes warmer(more yellow/red)b. Spectral colour- refers to any color that occurs in the visible spectrum and is evoked by a single wavelength such as yellow. On the other hand, perceptive colour refers to an optical color mixture that can be visually perceived based on the reflected light rays such as Georges Seurat’s paintingQuestion 2a.

A He-Ne laser producing all of its light at 633 nm is a non thermal light source. This is because unlike thermal radiation sources that emit their radiation over a broad range of wavelengths (frequencies), He-Ne laser is a low energy that only produces its non thermal radiation in a narrow banc of 633 nm.b. Lasers are low power but radiate high intensity light because they concentrate their beams to very tiny spots.Question 3 No, it is not possible to have an electromagnetic wave with a large radiance and zero irradiance.

This is particularly because an illuminance can only include less energy per every unit area but not more than irradiance.Question 4Assuming bright light, the actual ratio of irradiances can be given by: light power/unit surface area = 630/550=25/22Question 5: byte: 11011010 =1byte127=Question 632bpp = 4 bytes of raw bitmap data per pixel.Question 7 A black light (also known as a UV-A light) is a kind of lamp which only emits long wave ultraviolet light. Although ultraviolet light is not visible, black lights make objects glow by also emitting a violet light which allow people to see objects (Kitsinelis 108).

Question 8P= Tσ σ , 5.67x 108 watts/sq.m./K . P=6000/1000 x5.67 x108 watts/sq.m./K . Area=34.02 x108 watts/sq.m./K.Question 9 Maximum Separation= 3x104 25 =1.2 x103Question 10Tungsten melting point =3695 K Wein;s law: λλmax max T = 0.2898 x 10 T = 0.2898 x 10--2 m • K. m • 2= 0.2898 x 10 T = 0.2898 x 102 m • K. m 3695 K Wavelength of the most intense radiation at melting point =7.843 x 10-3 Tungsten is used for filaments due to its high melting point, greater tensile strength and lowest vapor pressure.

Works CitedKitsinelis, Spiros. The Right Light: Matching Technologies to Needs and Applications. CRC Press, 2012. Print.