Preboard/Board Full Syllabus Mock Paper | Part 2 | Class 10 Physics | CBSE Board 2025 | Abhishek Sir

[@Class10byRankplus]

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[@TheDoodleMaster]

1)One dioptre is the power of a lens with a focal length of one meter 2)Red is used for danger signals because it scatters the least when it hits small particles of fog, smoke, water, or dust 3)Violet light deviates the most when passing through a prism, while red light deviates the least 4)ready for boards

[@ayushanand824]

1.One dioptre is the power of a lens with a focal length of one meter. 2.Red is used because due to its high wavelength ,it has least deviation hence the red colour will be most visible. 3.Violet colour deviates the most. 4.Bilkul confident hain sir foddd dengeee boards me.

[@amankhosla1720]

my name is Krishnam Khosla 1. One dioptre (D) is the power of a lens with a focal length of one meter 2. red colour is used in danger signs as it has the longest wavelength and it deviates the least 3. violet colour deviates the most as its has the least wavelength 4. board ki puri tyari hai phod denge kyunki boards tak tak draega jab tak ham uss dar ki ankho mai ankhe dal uss dar ko na dara dai

[@SnehalataSahoo-qn6tv]

1) DIAPTER IS THE UNIT OF POWER OF LENS THAT HAS THE FOCAL LENGTH OF ONE METER 2) RED COLOUR IS USED FOR DANGER SIGNAL AS IT HAS MORE WAVELENGTH AND LEAST DEVIATE COLOUR THAN ANY OTHER COLOURS 3)Violet light deviates the most when white light passes through a prism because it has the shortest wavelength and travels at a slower speed.. Sir I am Raja chandrasekhar

[@HarshJoshi-pq6rn]

1-One diopter is the power of lens without focal length 1m 2-Red is used for danger signal because it is scatter least when it small particle of fog smoke water or dust 3-Violet light David the most when passing through a prism while red light David the least 4- Ready for boards

[@radherani8437]

THANK SO MUCH SIR JI HUME ITNA SAMAJHNE KE LIYE ,BUS AAPKO DEKH KAR LAGTA H KI KAAS SAB AAP JAISE HOTE....I HAVE A HUGE RESPECT FOR YOU ...WHICH I CANNOT EXPRESSED IN WORDS ....KABHI JINDAGI NE MAUKA DIYA TO AAPSE MILNA CHAUGI....

[@JenithaLawrance]

1.1D=1/f 2.Red colour is used for danger signals because it has there longest wavelength 3. Violet colour deviates the most because it has highest frequency and shortest wavelength 4. Yes I am very veryconfident

[@HemaVarshini-z8e]

Homework 1) 1 Dioptre is the power of a lens of focal length 1m 2) Red is used in danger signal lights as it is scattered thr least by fog and smoke in the atmosphere. Hence to reach longer distances without much scattering, red is used. 3) Violet colour deviates the most due to its least wavelength and high refractive index 4) Medium level fear and confidence sir Balle balle🎉 Sir, it is given that at high temperatures, the chances of short circuiting are more. Sir but if temperature is more then resistance will be high so less current right..how is it possible?

[@harshitsabu2892]

1the power of a lens of focal length 1 metre.2 Since the colour red has the highest wavelength of all the colours it gets scattered the least. So, red light is used as a danger signal as it is able to travel the longest distance through the fog, rain, etc.3 violet 4

[@gurneetkaurjaidka3478]

Homework question 1 when the focal length of lens is 1 m then power is said to be 1 dioptre 2 red color is used in danger signal 3 violet deviates the most as it has short wavelength and less speed as refractice index is inversely proportional to speed 4 yes sir we are confident

[@syedhaseeb7345]

violet gets most deviated as it is having shorter wavelength

[@SirCovid-]

*Q1.* *1 Dioptre* is the SI unit of the power of a lens whose focal length is 1 metre. It is represented by the reciprocal of the focal length in dioptres. *Q2.* Red colour is used for danger signals because it scatters the least since it has a longer wavelength making it ideal for danger signals as they have to convey a danger message to the farthest objects. *Q3* Violet deviates the most when passed through a prism because of its characteristic shorter wavelength. *Q4* *YES SIR.*

[@syedhaseeb7345]

Red is the light which is used for the danger signal as it is not deviated by smoke dust

[@Channel-dl5ls]

MY NAME IS PAVITRA 1. 1 dioptre is defined as the power of a lens of focal length 1 metre. 2. RED 3. VIOLET Because the colour violet has the shortest wavelength and less speed 4. FULLY CONFIDENT

[@adnanmd1699]

Q1.1 dioptre is defined as the power of a lens of focal length 1 metre Q2.Red because it has the highest wavelength and can be seen from long distance Q3.Violet deviates the most in a prism as it has lesser wavelength Q4. Yes I am confident for boards all beacuse of you sir!! All the answers sirr :D

[@dineshattri2015]

1 ans The power of a lens with a focal length of 1 meter.2 ans is red due to its highest wave length and scatter least .3 ans violet due to its lowest wavelength and deviates most . 4 ans full confident hu sir jiii

[@tanishkachoudhary5127]

1. 1 dioptre is the power of lens with focal length 1m 2. red color is used in danger signals because it scatters the least 3. violet 4 . Yes sir I'm very confident

[@MaheshSaini-op8rj]

Answer1-(1 D = 1 m−1.) Answer2-Red Answer3-voilet Answer4-yes i am confident Mahesh saini Pls pin sir 1st comment

[@mrrdx0111]

ANSWER:-1 One dioptre is the power of a lens with a focal length of one meter. It is the SI unit of lens power and is represented by the letter D. ANSWER:-2 Red is used for danger signals because it is the least scattered by air, water, and dust molecules. This is because red light has the longest wavelength of all colors, and scattering is inversely related to the fourth power of a color's wavelength. ANSWER:-3Violet light deviates the most when white light passes through a prism because it has the shortest wavelength and travels at a slower speed

[@syedhaseeb7345]

power of focal length of 1 m is 1 diopter

[@paglem1084]

Ram ram😊

[@MeghaGarg-c8k]

Sir iss session ke notes kidhar available hai

[@HarshJoshi-pq6rn]

Abaki bar 95 percent par abaki bar Harsh ki sarkar

[@MyRIcaL566]

First comment 🙏

[@ayushanand824]

1. One dioptre is the power of a lens with a focal length of one meter. 2. Red is used because due to its high wavelength ,it has least deviation hence the red colour will be most visible. 3.Violet colour deviates the most. 4.Bilkul confident hain sir foddd dengeee boards me.