What besides the amount of light affects the size of the pupil of the eye?

Q: If light has a lot of energy, it will have

A: GIVEN: Light has energy

Q: What is the circle of illumination

A: THE  CIRCLE OF ILLUMINATION:-  The imaginary line that separates light from the darkness and day…

Q: how does a pigment affect light?

A: Pigments are molecules that absorb specific wavelengths of light and reflect all others. If the…

Q: How does the speed of light that emerges from a pane of glass compare with the speed of light…

A:

Q: What happens to a light ray when it travels from one material into a thicker (denser) material? Into…

A: Light waves change speed when they pass across the boundary between two substances with a different…

Q: If you can see the eyes of someone when you look into a mirror, can the other person see your eyes…

A: To determine: If we can see the eyes in the same mirror, when you see the eyes of someone on loking…

Q: What happens to a ray of light when it passes through a lens?

A: Lens can converge or diverge light.

Q: Based on your observation, what is the direction of the circulation of red food color? blue food…

A: As the heart beats, it pumps blood through a system of blood vessels called circulatory system.…

Q: When a light beam approaches you, its frequency is greater and its wavelength less. Does this…

A: Given: frequency and wavelength

Q: Light travels faster in    options:   dense air.   same in each.   vacuum   thin air.

A: Answer - Light travels faster in vacuum

Q: Propagation of light is

A:

Q: A woman standing on a cliff is watching a motor boat as the boat approaches the shoreline directly…

A: Given : Woman eyes are 250 foot above the water level

Q: How does the distance from a page to a light bulb affect the amount of light that illuminates the…

A: The illumination of a light bulb depends on the intensity of the light bulb. Higher the intensity at…

Q: The lens nearest the viewer’s eye is called the________.

A: The lens nearest the viewer’s eye is called the Eyepiece . An eyepiece is the lens which is…

Q: A friend says, in a profound tone, that light is the only thing we can see. Is your friend correct?

A: In the electromagnetic spectrum, we can only see the frequencies which lie in the visible range.

Q: hat happens when you "see" something? Something exits your eye but it isn't light. Light exits your…

A: Required : What happens when you "see" something?

Q: A ray of light traveling in air strikes the surface of a slab of glass at an angle of incidence of…

A:

Q: What is meant by scattering of light?

A:

Q: How does the speed of light in glass change on increasing the wavelength of light?

A: Speed of light in the glass:

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

A: Laser beams are considered as monochromatic beams .

Q: MOST humans have 3 types of cones in their retina (at the back of the eye) that allow color vision…

A: The cone in the retina allow colour vision in the eye.

Q: Long sight: The eyeball is too Your answer

A: Solution:         Hypermetropic correction

Q: Discuss how our everyday lives would be different if thespeed of light were only 25 m/s.

A: Given data: Speed of light is, c=25 m/s.

Q: How a lens refracts light?

A: Refractive index of lens is greater than the refractive index of air. When light travels from a…

Q: What are the properties of Light?

A: Light can act as a wave as well as a ray. Following are the properties of light: Reflection of…

Q: Does light take up space?

A: Given:  Light

Q: What are the receptors in the back of the eye which detect only in black and white? What are the…

A: (a) Photo receptors:  A specialized cells are called photo-receptors. Mainly two types of…

Q: Light travel faster in

A:

Q: What is lens?

A: A lens is a piece of transparent glass which concentrates or disperses light rays when passes…

Q: A ray of light passes from glass to water.

A: (i)  Using Snell's law ng Sin i = nw Sin r 1.52 X Sin 35 = 1.33 X Sin r 0.655159 = Sin r Sin-1…

Q: For an eye suffering from myopia which of the following apply?

A: Myopia is the one in which close object apears clerly but wide one dont.

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: Why the colour of the sky is blue?

A: When sunlight passes through the atmosphere, the fine particles in the air scatter the blue color…

Q: What is meant by power of accomodation of the eye

A: It is the process through which eye changes the optical power to focus the rays coming from the…

Stellar evolution

We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.

Red Shift

It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.