Why do blood of injured deep sea divers look greenish-black in underwater photographs taken with natural lights?

Q: Why is the foam of root beer white, while the beverage is dark brown?

A: In the case of foam, it is composed of tiny bubbles of very thin layers; therefore; the scattering…

Q: Why do wet objects normally look darker than the same objects when dry?

A: When light is incident on the wet objects, it undergoes internal reflection multiple times in the…

Q: Why does the sky sometimes appear whitish?

A: Our atmosphere consists of large number of dust and other air particles. According to their size of…

Q: The atmosphere of Jupiter is more than 1000 km thick. From the surface of Jupiter, would you expect…

A: Atmosphere is a blanket that covers the surface of a planet, it is composed of gas molecules, water…

Q: At noon the sun appears white as a) light is least scattered b) all the colours of the white light…

A: In order to reach the earth through the atmosphere, light has to travel a shorter distance only…

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

A: Black and white film, also known as orthochromatic films, are blue and green sensitive light films.…

Q: A swatch of pure red fabric is viewed through a green filter. The fabric appearsA. Red.        B.…

A: Red is a combination of yellow and magenta. In order to reflect yellow and magenta color, these…

Q: Which warms more quickly in sunlight- a colorless or a colored piece of glass? Why?

A: A colored glass can absorb all the colors except its own color while the colorless glass can't…

Q: Does the laser beam from the laser device degrade when passing through a glass prism?  *  Yes…

A: Generally lasers are very narrow band. Their bandwidth might be a thousand times narrower than the…

Q: Why do opaque materials become warmer when light shines on them?

A: The incident light energy on the material of the opaque substances vibrates the atoms r molecules of…

Q: Pilots sometimes wear glasses that transmit yellow light and absorb light of most other colors. Why…

A: Yellow filters allow green and red light to pass through while eliminating scattered blue and violet…

Q: Look at your red , sunburned feet when they are under water. Why don’t they look as red as they are…

A: Ray of light coming from red wound will undergo scattering and refraction both at water surface.

Q: In a boutique store with only fluorescent lighting, a customer insists on taking dresses into the…

A: The fluorescent light highlights high frequencies, and do not possess all range of colors to be…

Q: Why will the leaves of a red rose be warmed more than the petals when illuminated with red light?

A: The petals of a red rose reflect all the red light coming from the source, whereas the leaves absorb…

Q: Why does water make a shirt darker?

A: Transparency: When an object is placed in the sight of an eye and a person is still be able to see…

Q: Why does the blood of injured deep sea drivers look greenish black in underwater photograph when…

A: Water absorbs different wavelengths of light to different degrees. The longest wavelengths with the…

Q: Why are fabrics that fluoresce when exposed to ultraviolet light so bright in sunlight?

A: Fluorescence: It is a process in which the atom or substance emits a radiation of a larger…

Q: Why does the Sun appear reddish early in the morning?

A: When sun rises, the rays coming from the Sun have to travel a large distance in earth’s atmosphere…

Q: The atmosphere of Jupiter is more than 1000km thick .from the surface of Jupiter would you expect to…

A: Step 1Jupiter doesn’t have a surface; it consists of thick gas or a semi-liquid form due to the…

Q: Why is red paint red?

A: Red ochre is a simple compound composed of iron and oxygen which gives the colour to the paint.

Q: Why do diamonds sparkle?

A: A diamond, which has a very complex internal structure sparkles very brightly under a good light.…

Q: What is the reason why a green colored shirt looks green?

A: An object color appearance depends on the wavelengths of light which reflected by the object to an…

Q: Does the laser beam from the laser device degrade when passing through a glass prism?

A: Laser beams are considered as monochromatic beams .

Q: If the sunlight were somehow green instead of white, what color clothing would be most advisable on…

A: If the sunlight were somehow green instead of white, then on a very hot day green colored clothes…

Q: Red sunrises occur for the same reason as red sunsets. But sunsets are usually more colorful than…

A: The light rays coming from the sun toward earth either scattered or transmitted from the Earth’s…

Q: Why does water appear cyan?

A: Water molecule absorbs red light very strongly, so when red light is subtracted from the white light…

Q: Light cannot easily escape a diamond. Why?

A: Concept:-  The above problem can be resolved using the concept of critical angle. Critical angle is…

Q: Why does smoke from campfire look blue against trees near the ground but yellow against the sky?

A: We see the scattered light from the smoke which is blue in color near the ground, while in the sky,…

Q: Why does the Sun look reddish at sunrise and sunset but not at noon?

A: The sun appears reddish at sunrise and sunset due to the scattering of light due the small air…

Q: In which of these cases ripe bananas appear black- when illuminated with red, yellow, green or blue…

A: The color of the ripe banana must be yellow. Now the question arises what color should be mixed with…

Q: When children make bubbles with soap water some of the bubbles initially do not show any colors. But…

A: Question based on bubbles of soap water

Q: If you were to subject a green ink to paper chromatographic separation, what are the possible colors…

A:

Q: why light cannot easily escape a diamond ?

A: Question: Why light cannot easily escape diamond?   Answer: Suppose a diamond is in the air.  A ray…

Q: Tennis ball used to be white, what is the color preferred nowadays and why?

A: At present, tennis balls are yellow-green color and this is because this color is more sensitive to…

Q: which warms more quickly in sunlight -a colourless or coloured piece of glass? Also explain Why?

A: A coloured glass can absorb all the colours except its own colour while the colourless glass can’t…

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"…

Q: Why does the blood of injured deep-sea divers look greenish-black in underwater photographs taken…

A: Natural light at low depths of the ocean is blue due to the filtering effect of a water above. There…

Dispersion of White Light

Snell’s law is a formula that gives a relation between the angle of incidence and angle of refraction and is given as: