Answer: When a ray of light enters a prism, it bends because of refraction of light. When the ray of light finally emerges out of the prism. it deviates drastically from its original path. This...
Answer: The sun appears red at sunrise and sunset because the sun is closer to the horizon during these times of the year. During its journey to our eyes, sunlight passes through a denser layer of...
The refraction of light through a triangular glass prism is depicted in the illustration above. At the first surface AB, a beam of light PE is penetrating the glass from the surrounding air. Due to...
Answer: Myopia is a condition in which a person's ability to see distant objects clearly is impaired. Myopia is a condition in which the image is created in front of the retina rather than behind...
Answer: The human eye is considered to be one of the most valuable and sensitive sense organs on the planet. It allows us to take in the beauty of the world and the colours that surround us. After...
Answer: The sun appears red at sunrise and sunset because the sun is closer to the horizon during these times of the year. During its journey to our eyes, sunlight passes through a denser layer of...
Answer: The colour blue is the one that scatters the most light in the visible spectrum, and it is the most intense. As a result, the blue colour is able to reach us and the sky appears to be blue.
Answer: Rainbows are generated by the dispersion of sunlight by microscopic water droplets in the atmosphere, which are present in the air. A rainbow is always generated in the opposite direction to...
Answer: When starlight enters the earth's atmosphere, it is subjected to constant refraction. Refraction happens in a material with a refractive index that is gradually changing. Starlight is...
Solution: The ray diagram is:
Solution: Using two identical prisms that are inverted with regard to one another, we can create a narrow beam of white light that is incident on one prism and emerges out of the second prism as...
Answer: Myopia is a condition in which a pupil is unable to see the chalkboard that is far away from her. As a result, the doctor recommends a concave lens with a proper focal length. Negative sign...
Solution: Myopia is a condition in which a pupil is unable to see the chalkboard that is far away from her. As a result, the doctor recommends a concave lens with a proper focal length. Answer is...
Answer: By varying the focal length of the lens, we can make our eyes focus on images from a variety of different distances. The action of the Ciliary muscle aids in the adjustment of the focal...
Myopia is a condition in which a pupil is unable to see the chalkboard that is far away from her. As a result, the doctor recommends a concave lens with a proper focal length.
Solution: Myopia is a condition in which a person's ability to see distant objects clearly outweighs his ability to perceive those closer to him. Hypermetropia is a condition in which a person...
Solution: Answer is (c) A person with myopia can see nearby objects clearly Myopia is a condition in which a person's ability to see distant objects clearly outweighs his ability to perceive those...
Solution: Answer is (a) are relaxed and the lens becomes thinner When the eye muscles relax and become thinner, the focal length of the eye lens grows in proportion to its thickness. The retina is...
Solution: The answer is (b) the outer surface of the cornea The cornea is a thin membrane that allows light to pass through to the eye. When light rays strike the cornea, they are bent inward and...
Solution: The answer is (b) reflection of sky in water Explanation: Water is colourless, but it takes on the colour of whatever it is reflected by. As a result, the sea seems blue.
Solution: The answer is (b) Scattering of light Explanation: Because red scatters the least amount of light, it may go a long distance. When the sun sets or rises, light has to travel a long...
Solution: The answer is (b) is scattered the least by smoke or fog Because the wavelength of red colour is the longest, it may be seen clearly from a long distance. It is the colour that is least...
Solution: The correct option is C All of the colours in the white light travel at the same speed as one another. Because air is not a dispersive medium, light of all wavelengths travels at the same...
Solution: Answer is (c) violet and blue lights get scattered more than lights of all other colors by the atmosphere. Rayleigh's scattering of sunlight is responsible for the blue appearance of the...
Solution: The answer is (b) all the colours of the white light are scattered away This is due to the dispersion of light caused by the presence of air in the environment.
Solution: Answer is (c) Refraction, dispersion, and internal reflection Dispersion of light results in the scattering of white light into multiple colours at different angles, resulting in internal...
Solution: The answer is (b) (ii) If the prism is kept with BC at the bottom, a band of colour appears at the bottom that is violet. If the prism is kept with BC at the top, violet will be at the top...
Solution: Answer is (a) The near point of his eyes has receded away In hypermetropia, the near spot of the eye is moved away for 25 cm. Thus, in order to read properly, the user needs maintain the...
Solution:The answer is (b) – 0.5 D Because the individual is myopic and in need of a concave mirror, the power would be in the negative. P=1/f=1/2m=0.5 D.