Podcast
Questions and Answers
What is the relationship between light energy and frequency according to Max Planck's equation?
What is the relationship between light energy and frequency according to Max Planck's equation?
- E = h / f
- E = hf (correct)
- E = f - h
- E = f / h
What happens to the energy of light when its wavelength increases?
What happens to the energy of light when its wavelength increases?
- It increases
- It remains the same
- It decreases (correct)
- It becomes zero
What is the sum of reflection, refraction, and absorption of light when it strikes a surface?
What is the sum of reflection, refraction, and absorption of light when it strikes a surface?
- R + r + A = 1 (correct)
- R + r + A = 0
- R + r + A = 2
- R + r + A = 50%
What is the index of refraction?
What is the index of refraction?
What is unique about the behavior of light?
What is unique about the behavior of light?
What happens when a light beam meets a new material at an angle other than perpendicular?
What happens when a light beam meets a new material at an angle other than perpendicular?
What is the primary source of light in the world?
What is the primary source of light in the world?
What is the result of a light photon being absorbed in a sensitive cell of the retina?
What is the result of a light photon being absorbed in a sensitive cell of the retina?
What is the primary use of IR light in medicine?
What is the primary use of IR light in medicine?
What is the term for the emission of a lower energy light photon when a photon is absorbed?
What is the term for the emission of a lower energy light photon when a photon is absorbed?
What is the result of light being absorbed in a material?
What is the result of light being absorbed in a material?
What is the difference between diffuse and specular reflection?
What is the difference between diffuse and specular reflection?
What is the term for the scattering of light in many directions?
What is the term for the scattering of light in many directions?
Where is light reflected at an angle equal to the angle at which it strikes the surface?
Where is light reflected at an angle equal to the angle at which it strikes the surface?
What is the condition in which an excess of bilirubin is excreted by the liver into the blood?
What is the condition in which an excess of bilirubin is excreted by the liver into the blood?
What type of light is used to sterilize medical instruments?
What type of light is used to sterilize medical instruments?
What is the result of exposing the skin to UV light from the sun?
What is the result of exposing the skin to UV light from the sun?
What is the benefit of phototherapy in premature infants?
What is the benefit of phototherapy in premature infants?
What is the energy level of ultraviolet photons compared to visible photons?
What is the energy level of ultraviolet photons compared to visible photons?
What is the result of UV light interacting with the skin?
What is the result of UV light interacting with the skin?
What is the year in which phototherapy was discovered to treat jaundice in premature infants?
What is the year in which phototherapy was discovered to treat jaundice in premature infants?
What is the wavelength of light that produces sunburn?
What is the wavelength of light that produces sunburn?
What happens to the 300 nm light when it passes through ordinary window glass?
What happens to the 300 nm light when it passes through ordinary window glass?
What is the major cause of skin cancer in humans?
What is the major cause of skin cancer in humans?
Where does skin cancer usually appear on the body?
Where does skin cancer usually appear on the body?
What percentage of the sun's energy is in the IR region?
What percentage of the sun's energy is in the IR region?
What is the main reason we feel warmth from the sun?
What is the main reason we feel warmth from the sun?
What is the purpose of heat lamps used in physical therapy?
What is the purpose of heat lamps used in physical therapy?
What is a characteristic of IR light compared to visible light?
What is a characteristic of IR light compared to visible light?
What is the wavelength range of IR light used in heat lamps?
What is the wavelength range of IR light used in heat lamps?
UV light with a wavelength of 300 nm can pass through ordinary window glass.
UV light with a wavelength of 300 nm can pass through ordinary window glass.
Skin cancer is most common on parts of the body that receive little sunlight.
Skin cancer is most common on parts of the body that receive little sunlight.
IR light is better able to heat deep tissues than visible light.
IR light is better able to heat deep tissues than visible light.
The majority of the sun's energy is in the visible spectrum.
The majority of the sun's energy is in the visible spectrum.
The warmth we feel from the sun is mainly due to UV light.
The warmth we feel from the sun is mainly due to UV light.
UV light is the primary cause of skin cancer in humans.
UV light is the primary cause of skin cancer in humans.
Heat lamps are used to treat skin conditions.
Heat lamps are used to treat skin conditions.
UV light with wavelengths of 1000 to 2000 nm is used in heat lamps.
UV light with wavelengths of 1000 to 2000 nm is used in heat lamps.
The sun's energy is primarily composed of visible light.
The sun's energy is primarily composed of visible light.
The DNA in cells is able to absorb visible light.
The DNA in cells is able to absorb visible light.
