Which is matched correctly with its unit of measure? O luminous flux - lumens illuminance - malus O illuminance - lumens O luminous flux - lux

Q: Why do objects illuminated by moonlight lack color?

A: Objects illuminated by moonlight do not lack color. It is just that the intensity of moonlight is…

Q: Consider an opaque body capable of absorbing red light and illuminated by: Yellow light

A: given: body absorbs = red light (R) illuminated by   = yellow light  (Y)

Q: When the volume of an illuminated spherical object is doubled, the luminous flux is quadrupled. Truo

A: Ans is False

Q: When the light is passing from rarer to a denser medium, which is the correct statement?

A: When refractive index=1 , then there is no change in path of light.

Q: How did thomas young prove light was a wave?

A: Scientist Young made experiment of Young Modulus.  He took a light source and light incident on two…

Q: How long does it take light to travel?

A: The time taken by the light to travel from sun to earth can be given as

Q: Light From a camera flash weakens with distance in accord with the inverse-square law. Comment on an…

A: Given:  camera flash

Q: Does a viewer see single color or a spectrum of colors coming from a faraway drop?

A: Every raindrop is a spherical shape that behaving likes a small glass prism.

Q: According to Sir Isaac Newton, light:

A: Newton given a theory to explain nature of light called corpuscular theory

Q: Why can't we see stars in day time?

A: The Earth we live is a unique planet for human to survive. It contains atmosphere with the suitable…

Q: what is the reason some spectra show the full range of colors while some only give a few colored…

A: This question can be answered by the definitions of emission and absorption sprectra. Emission…

Q: Light behaves like a ______ when it interacts with matter, and like a _______when it interferes with…

A: Light behaves as a particle when it interacts with matter for example, in the photoelectric effect,…

Q: How do objects appear when all of the colors of light are absorbed? Reflected? Selectively absorbed?

A: Light provides sensation to eyes so we see objects around. When light falls on an object, 3 things…

Q: Materials/objects 1. Radio 2. Microwave 3. Infrared 4. Visible 5. Ultraviolet 6. X-ray 7. Gamma ray…

A: The electromagnetic spectrum is the entire distribution of electromagnetic radiation according to…

Q: How are sound waves and light waves alike and different?

A: Similarity in Sound and light waves: Both the light and sound waves can transfer of energy. Both…

Q: Radio waves diffract Y [Select ] less than visible light. more

A:

Q: How is the wavelength of light related to its frequency?

A: Wavelength is defined as it is the distance between the identical points in the adjacent cycles of…

Q: About how much of the measured electromagnetic spectrum does light occupy?

A: An electromagnetic spectrum consists of wise range of waves.  Gamma Rays, X rays, Ultraviolet rays,…

Q: The colors are not always the same in a spectrum and in a rainbow

A:

Q: How does incident light that falls on an object affect the motion of electrons in the atoms of the…

A: When light with a certain frequency is incident on an object it can be absorbed, reflected or…

Q: What are the subtractive primary colors?

A: Subtractive colors contains colorants and reflected light.

Q: Calculate the frequency of red light,

A: Given; Calculate the frequency of red light ? Where,  Wavelength= 680 nm  Speed of light= 3×108 m/s

Q: What is the difference between a waveform and a spectrum?

A: Wave form of a signal is the shape of its graph as a function of time, independent of its time and…

Q: Does light travels through lighter atmosphere faster than heavier atmosphere?

A: The light always travel at the same speed everywhere, but light travels slower through glass, air…

Q: The wavelength of range of the visible spectrum extends from violet (400nm) to red (750nm). Express…

A:

Q: How much time does it take light from a flashcamera to reach a subject 6.0 x10 meters across a room?…

A: Distance = speed x time

Q: Mention and explain an everyday phenomenon in which the dispersion of light can be observed.

A: Dispersion The spreading of white light in its constituent colours (that is the spectrum of colours)…

Q: The nature of light theories are: Particles O Waves O Particles - Waves All answers correct O

A: In physics, there are two nature of light theories. First theory defines light as a particles.…

Q: Explain the dual nature of light.

A: Introduction: Light consists of tiny bits of energy called photons. This is a form of energy called…

Q: Which color of light is produced by mixing red light and blue light?

A: Ans is Magenta

Q: In general, larger wavelengths tend to diffract more than smaller wavelengths

A: The amount of diffraction depends on the wavelength of light, with shorter wavelengths being…

Q: If you want to increase the light gathering power by a factor of 10, by what factor does the…

A:

Q: You can see your lecturer in class (if you are there) because O They emit visible light They reflect…

A: We can see any object when the light falls on object and then the reflected light from the object…

Q: If you fire a bullet through a board, it will slow down inside and emerge at a speed that is less…

A: No, light does not slow down when it passes through glass and emerges at a slower speed. When a…

Q: Were you able to infer the literary meaning of the word " light"?

A: The quanta of light is Photon. So, we can say that " Light is the wave of photon".

Q: When light goes from a more dense medium to a less dense one,

A: Refraction is the phenomena of light in which light bends when passing through one transparent…

Q: What is it, exactly , that waves in a light wave?

A: Light is an electromagnetic radiation. It can travel through vacuum and doesn’t require a material…

Q: What do you mean by photochromic lenses?

A: To describe a photochromic lens.

Q: Which of the following is true about light?

A: Light acts as a particle and wave at the same time. In quantum mechanics, wave and particle has dual…

Q: 19) If the atmosphere were twice as thick as it currently is (extending farther into space), what…

A: The atmosphere appears blue and the Sun appears yellow since the lower wavelengths of the light are…