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When a ray of light enters a glass slab from air 
  • a)
    Its wavelength decreases 
  • b)
    Its wavelength increases 
  • c)
    Its frequency increases 
  • d)
    Neither its wavelength nor its frequency changes. 
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
When a ray of light enters a glass slab from aira)Its wavelength decre...
When a ray of light enters a glass slab from the air, the velocity and wavelength decrease. V=nℷ , Where velocity and wavelength are directly proportional.
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When a ray of light enters a glass slab from aira)Its wavelength decre...
Explanation:

Refraction of light:
When a ray of light enters a different medium, such as a glass slab from air, it undergoes refraction. Refraction is the bending of light as it passes from one medium to another.

Change in wavelength:
- As light enters a denser medium like glass from a less dense medium like air, its speed decreases.
- According to the formula speed = wavelength x frequency, if the speed decreases, either the wavelength or frequency must change.
- In this case, the wavelength of light decreases as it enters the glass slab.

Reason for decrease in wavelength:
- The decrease in wavelength is due to the change in speed of light in different mediums.
- When light enters a denser medium like glass, it slows down, causing its wavelength to decrease.

Conclusion:
- Therefore, when a ray of light enters a glass slab from air, its wavelength decreases. This phenomenon is a result of the change in speed of light as it moves from one medium to another.
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When a ray of light enters a glass slab from aira)Its wavelength decreasesb)Its wavelength increasesc)Its frequency increasesd)Neither its wavelength nor its frequency changes.Correct answer is option 'A'. Can you explain this answer?
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