URGENT! PLEASE ANSWER TO THESE QUESTIONS. I WILL MARK BRAINLIEST FOR CORRECT ANSWER.
Q3. How can a concave lens behaves as an ordinary glass plate? 2
Q4. What will happen to the focal length of a lens when the colour of incident radiation is changed? 2.
Answers
Answered by
1
Answer:
Ans3: When the medium has the refractive index same as that of the convex lens, it behaves as an ordinary glass plate.
Ans4: The focal length of the lens varies directly with the wavelength of the light used and as wavelength is inversely related to refractive index, the focal length also varies inversely with it. This is the principal cause of the phenomena of chromatic aberration. The frequency of light has no effect on the focal length.
Similar questions