
Assertion: Light is produced in gases in the process of electric discharge through them at high pressure.
Reason: At high pressure electrons of gaseous atoms collide and reach an excited state.
A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If the assertion is true but the reason is false.
D. If assertion and reason both are false.
Answer
161.4k+ views
Hint:To answer this question, we will first verify the accuracy of the supplied assertion and reason statements, and then we will determine whether or not the reason provides the proper justification for the assertion.
Complete step by step solution:
According to the question, we have given an assertion as Light is produced in gases in the process of electric discharge through them at high pressure which is incorrect because the light is produced at very low pressure and high potential difference due to which accelerated electrons collide with the atoms of the gases and in this atoms gets in an excited state and when they came back to their normal state they lose energy in the form of light energy so, the assertion is incorrect and the given reason that at high-pressure electrons of gaseous atoms collide and reach and excited state is also incorrect because phenomenon doesn’t happen at high pressure.
Hence, the correct answer is option D.
Note: It should be remembered that atoms gain energy during the collision with accelerated electrons and get into the excited state and during the transition between two states atoms always lose energy from a higher state to the lower state and vice versa, and this energy is in the form of light energy.
Complete step by step solution:
According to the question, we have given an assertion as Light is produced in gases in the process of electric discharge through them at high pressure which is incorrect because the light is produced at very low pressure and high potential difference due to which accelerated electrons collide with the atoms of the gases and in this atoms gets in an excited state and when they came back to their normal state they lose energy in the form of light energy so, the assertion is incorrect and the given reason that at high-pressure electrons of gaseous atoms collide and reach and excited state is also incorrect because phenomenon doesn’t happen at high pressure.
Hence, the correct answer is option D.
Note: It should be remembered that atoms gain energy during the collision with accelerated electrons and get into the excited state and during the transition between two states atoms always lose energy from a higher state to the lower state and vice versa, and this energy is in the form of light energy.
Recently Updated Pages
A steel rail of length 5m and area of cross section class 11 physics JEE_Main

At which height is gravity zero class 11 physics JEE_Main

A nucleus of mass m + Delta m is at rest and decays class 11 physics JEE_MAIN

A wave is travelling along a string At an instant the class 11 physics JEE_Main

The length of a conductor is halved its conductivity class 11 physics JEE_Main

Two billiard balls of the same size and mass are in class 11 physics JEE_Main

Trending doubts
JEE Main 2025 Session 2: Application Form (Out), Exam Dates (Released), Eligibility, & More

JEE Main 2025: Derivation of Equation of Trajectory in Physics

Displacement-Time Graph and Velocity-Time Graph for JEE

Electric Field Due to Uniformly Charged Ring for JEE Main 2025 - Formula and Derivation

Class 11 JEE Main Physics Mock Test 2025

JoSAA JEE Main & Advanced 2025 Counselling: Registration Dates, Documents, Fees, Seat Allotment & Cut‑offs

Other Pages
NCERT Solutions for Class 11 Physics Chapter 1 Units and Measurements

JEE Advanced Marks vs Ranks 2025: Understanding Category-wise Qualifying Marks and Previous Year Cut-offs

Units and Measurements Class 11 Notes: CBSE Physics Chapter 1

Motion in a Straight Line Class 11 Notes: CBSE Physics Chapter 2

NCERT Solutions for Class 11 Physics Chapter 2 Motion In A Straight Line

Important Questions for CBSE Class 11 Physics Chapter 1 - Units and Measurement
