Refractive index of a transparent medium is defined as the ratio of speed of light in free space (vaccum) to the speed of light in the given medium. Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.
Category: Class 12 Physics
NCERT Solutions for Class 12 Physics updated for CBSE academic session 2021-2022.
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Use of convex mirror as a side view mirror in vehicles enhances the field of view of driver as he can now see clearly the vehicles coming from behind a vehicles. Class 12 Physics Chapter 9 Ray Optics and Optical ...
When an ideal capacitor is fully charged by a d.c. battery, the electric field E between the plates of capacitor does not change with time. Therefore, displacement current is zero. when an a.c. source is applied between the plates of ...
Professor C.V. Raman’s demonstration was based on the radiation pressure exerted by e.m. waves. Tails of coments are due to pressure exerted due to solar radiation. Class 12 Physics Chapter 8 Electromagnetic Waves Session 2024-2025.
A microwave oven heats up a food item containing water molecules efficiently because frequency of waves produced in oven just matches with the frequency of vibrations of water molecules. Class 12 Physics Chapter 8 Electromagnetic Waves Session 2024-2025.
As electromagnetic waves are plane polarised, therefore the receiving antenna of portable radio should be parallel to electric/magnetic part of the wave. Class 12 Physics Chapter 8 Electromagnetic Waves Session 2024-2025.
Yes, the magnitude of displacement current changes [actually decreases] if the frequency of the a.c. source is decreased. Class 12 Physics Chapter 8 Electromagnetic Waves Session 2024-2025.
Magnitudes of both conduction current as well as displacement current are zero when a capacitor is fully charged by a d.c. source. Class 12 Physics Chapter 8 Electromagnetic Waves Session 2024-2025.
Ultraviolet rays are used for water purifiers as well as in LASIC eye surgery. Class 12 Physics Chapter 8 Electromagnetic Waves Session 2024-2025.
Microwaves. Usedin microwave oven. Class 12 Physics Chapter 8 Electromagnetic Waves Session 2024-2025.