Why do photographers use a red light in the darkroom when developing black and white film?

Q: The index of refraction of a certain type of glass is expressed by the relation: 4825 nm2 n(1) =…

A:

Q: showed that a thin film whose thickness is onequarter of the wavelength of light in the film serves…

A: Given showed that a thin film whose thickness is one- quarter of the wavelength of light in the film…

Q: The RGB color beams of a cathode ray tube (CRT) display are generated in what way exactly?

A: A CRT is the technology, stands for cathode-ray tube. It  is a specialized vacuum tube in which…

Q: From the data shown in the image, the value of Oc is:

A: given θt=300. n0 =1 n1 =1.49 where n0 and n1  are refractive index of media. according to snells…

Q: If the x-ray wavelength used in the crystalline diffraction is equal to (0.4 A9), then the energy of…

A:

Q: Note : the color code table Color Coding Color Figure Black Brown 1 Red Orange 3 Yellow 4. Green…

A: Given: Rx=RsL1L2 a) Using the following values of L2L1,Rs to calculate the slope. A(1,155.5…

Q: For light of wavelength 589 nm, calculate the critical angles for the following substances when…

A: Wavelength (λ) = 589 nm we have to find critical angles for different medium

Q: A spacer is cut from a playing card of thickness 2.88 × 10-4 m and used to separate one end of two…

A: Given that, Thickness is given by, t = 2.88 × 10^(–4) mLength of the glass plate is given by, l =…

Q: A fishing boat accidentally spills 4 barrels of diesel oil into the ocean. Each barrel contains 46…

A: Number of barrels of diesel oil spilled into the ocean = 4Volume of each barrel = 46…

Q: How does the dual nature of light play a role in the Young's double-slit experiment?

A: Young's double-slit experiment is a classic experiment in physics that demonstrates the wave-like…

Q: When you look at a red rose in the sun light you're seeing

A: The question is if the red rose is seen in sunlight, what exactly is that which is being perceived.

Q: monochromatic light is incident on a thin film of chloroform and equals 1.4 over water and equals…

A: The coating has higher refractive index than the actual interference medium. i.e. water…

Q: 7. For a grating that contains 1400 blazes/mm, if angle of incidence = 48° and n=2, then wavelength…

A: This is a problem related to the diffraction of the light through a diffraction grating. The formula…

Q: Consider a length of green gel 570 nm, and a red wavelength of 750 nm. As a result of the doppler…

A: SOlution: green lght wavelenght 570 nm, and a red wavelength of 750 nm.

Q: While contemplating the food value of a slice of ham, you notice a rainbow of color reflected from…

A: In thin-film interference, the light reflected from the top and bottom surfaces of a film will…

Q: Could x-ray diffraction effects with crystals be observed by using visible light instead of x rays?…

A: The diffraction effects with crystals cannot be observed by visible light.

Q: List any two applications of ultra violet rays.

A: UV rays from the Sun inactivate the bacteria present in the washed clothes and help to protect us…

Q: (510 nm) that is

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Q: How does a hologram differ from a conventional photograph?

A: A hologram differs from a conventional photograph in the following ways:

Q: Find the X-ray wavelength that would give a third order reflection (i.e. n = 3) with an angle of…

A: spacing between the planes of atom,d=3.26 Å = mangle of reflection  order of reflection, n= 3

Q: Give two reasons (explaining in physical terms) to explain why wet hair looks darker than dry hair

A: This is the basic phenomenon behind this is the reflection of light. When a body absorb more light…

Q: Choose all the possible items match with CO2 application in dentistry. wavelength of 10600 nm…

A:

Q: The separation of white light into its component colors by means of a triangular prism is known as

A: Dispersion of white light through a prism is a phenomenon in which the white light is separated into…

Q: What is meant by the terms "monochromatic" and "polychromatic"? Refer to the result observed in both…

A: Monochromatic light Literally, mono refers to single, and chroma means colour.  Light consisting a…

Q: Using an optical system whose focal length ecuals to the diameter of lens and K=0.6 in the air as…

A: The lens is an optical device that converges or diverges the incoming light rays. The lens has to…

Q: a thin film of  MgF2 ​(n​ = 1,38) with thickness of 8,25×10−5 cm​ was put on glass ​(n​ =1,55​). If…

A: Given; The refractive index of thin film of MgF2, n=1.38 Refractive index of glass, ng=1.55…

Q: mg = kx where (g) is the gravitational acceleration = 9.8 ms? Data for hooks exp.xlsx Plot a graph…

A: The equation is mg=kx hence if we plot the elongation of spring x along the X axis and the mass used…

Q: A thin film of water of thickness 220nm is placed on top of a glass surface. What color will the…

A: Given, Thickness of water film on glass surface = 220 nm

Q: (3) Find the first Brillouin zone for the following crystals. (b)

A: According to solid state theory Brillouin zone is a limited range where an electron's energy and…

Q: The air in a dark, smoky room often looks bluish when illuminated by white light. What creates this…

A: Given statement : "The air in a dark, smoky room often looks bluish when illuminated by white light"…

Wien's displacement law

Students often get confused between Wien's displacement law and Planck's radiation law. Although both are historically related, yet they are conceptually different. Planck's law helps determine the spectrum of a blackbody, while Wien's law determines the relationship between peak wavelength and temperature.