What are the circular spots of light seen on the ground beneath a tree on a sunny day?

Q: A man’s eyes 2.5 m above sea level can barely see the top of a lighthouse which is at a certain…

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Q: You have enrolled in a scuba diving class and while swimming under water in a nearby lake you look…

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Q: What is the circle of illumination

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

Q: gap e globes

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Q: How was the speed of light discovered?

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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: You have enrolled in a scuba diving class and while swimming under water in a nearby lake you look…

A: Angle from vertical , θi = 32°  Refractive index of air , ni = 1 Refractive index of water , nw =…

Q: What is the another name for Farsightedness?

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Q: Why are we able to see the moon? * O reflects the sun's light O makes its own light O glows in the…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: You have enrolled in a scuba diving class and while swimming under water in a nearby lake you look…

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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: why does the moon seem to be producing light from the student’s view?

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Q: Do you have an idea about how the rainbows were formed?

A: Do you have an idea about how the rainbows were formed?

Q: What is infinity mirror meaning?

A: Infinity mirror is when two or more parallel mirrors create smaller and smaller reflections that…

Q: The bending of light as it passes into a different medium is an example of:

A: Answer:  Refraction

Q: In addition to the formation of shadows and eclipses,  what other phenomena prove the rectilinear…

A: Formation of shadows is due to phenomena of rectilinear propagation of light . Shadows are created…

Q: Is it possible for a fire to cast a shadow?

A: Is it possible for a fire to cast a shadow?

Q: What happens to light when it passes from rarer medium to denser medium?

A: When a beam of light passes from rarer medium to denser medium, it refracts or bends towards the…

Q: How has the theory of light changed over time?

A: The theory of light has changed a lot over time. In the 16th century light was assumed to be made up…

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

A: Lens can converge or diverge light.

Q: How does the speed of light in empty space compare to the speed of light in air? OSome colors travel…

A: How does the speed of light in empty space compare to the speed of light in air? In a medium a speed…

Q: Do you have an idea why the sky is blue? Why the clouds are white? Why the sunset is red or reddish…

A: why the sky is blue? The gases and dust particles in the atmosphere scatter the sunlight that…

Q: Suppose you are standing such that a 32-foot tree is directly between you and the sun. If you are…

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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: What is focal point?

A: Focal point is a central point of attention.

Q: What is meant by azimuth angle?

A: Required : What is meant by azimuth angle.

Q: A setting Sun is seen as distorted on Earth, but not by astronauts on the Moon. What causes this…

A: Given: setting Sun

Q: Use the terms luminous and illuminated to describe the visual relationship between the sun and the…

A: Luminous objects are generate their own light by the production of energy. Illuminated objects are…

Q: Can stars be seen from the moon’s surface in the daytime when the sun is shining?

A: On earth surface, there are atmosphere levels where scattering of sunlight occurs in daytime and…

Q: For a 1.8 meter tall person standing L meters from a plane mirror to see their entire body , it must…

A: For a plane mirror,  Distance of image from the mirror in opposite side of object = distance of…

Q: A 20kg dog and a 60kg dog are placed at the opposite ends of an 8-meter-long light beam. Where…

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Q: When the "full" moon rises, the color is yellowish while its color directly overhead is white.  Why?

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Q: Stars have a brighter light than Sun. Hence they are not visible in the morning but then why is the…

A: In the whole lunar month the moon is the single  instant that the exact time of the full moon  when…

Q: What would you observe if you tilted a barometer 30 from the vertical? Explain.

A: The pressure due to the fluid is given by  P = h d g  where, h is the height, d is the density of…

Q: There is a light source provide 2000 lumens, which illuminates a surface given with a length of 9 m…

A: Given  Light intensity  L = 2000 lumens Length  l = 9m  Width  w =8m To find  Illuminance Solution…

Q: The vertical distance between eye level and the ground for a certain swimmer, who is standing…

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Q: Can stars be seen from moon's surface during daytime when sun is shining?

A: The sun and the stars are clearly visible from the surface of moon. This is because there is no…

Q: What is the speed of dark?

A: The light has a speed of 3×108 m/s and it takes about 8 minutes to reach the earth. The small…

Q: What is meant by power of a lens?

A: The power of lens tells about the bending of rays of light when it passes through the lens.

Q: An area with two identical lamps located above the clouds at a height of 30 ft and at a distance of…

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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.