(A) | Incident rays travelling parallel to the principal axis always pass through \(F\) after reflection. |
(B) | Incident rays passing through \(F\) always travel parallel to the principal axis after reflection. |
(C) | The image formed is always inverted. |
(D) | The image formed is always real. |
(E) | The image formed is always larger than the object. |
1. | (A) and (C) only |
2. | (C), (D) and (E) only |
3. | (B) and (D) only |
4. | (A) and (B) only |
Column-I | Column-II | ||
A. | P. | zero | |
B. | Q. | \(P\) | |
C. | R. | \(2P\) | |
D. | S. | \(\dfrac P2\) |
1. | A → Q, B → P, C → S, D → R |
2. | A → S, B → R, C → Q, D → P |
3. | A → Q, B → S, C → Q, D → R |
4. | A → S, B → R, C → Q, D → Q |
Statement I: | In total internal reflection, the angle of incidence must be greater than a certain minimum angle which depends on the media involved. |
Statement II: | Total internal reflection cannot occur when light is travelling from an optically rarer to a denser medium. |
1. | Statement I is incorrect and Statement II is correct. |
2. | Both Statement I and Statement II are correct. |
3. | Both Statement I and Statement II are incorrect. |
4. | Statement I is correct and Statement II is incorrect. |
Assertion (A): | Critical angle of light passing from angle to air is minimum for violet colour. |
Reason (R): | The wavelength of violet light is greater than the light of other colours. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |
Assertion (A): | The angle of deviation depends on the angle of the prism. |
Reason (R): | \(\delta=(\mu-1)A.\) | For the thin prism,
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |
1. | \(f' = f,f'' =2f\) | 2. | \(f' = 2f, f''=f\) |
3. | \(f' =f, f''=f\) | 4. | \(f'=2f, f''=2f\) |
1. | become zero. |
2. | become infinite. |
3. | become small, but non-zero. |
4. | remain unchanged. |
In a compound microscope, the magnification is \(95\), the distance of the object from the objective lens is \(\frac{1}{3.8}~\text{cm}\) and the focal length of the objective is \(\frac{1}{4}~\text{cm}\). What is the magnification of the eyepiece when the final image is formed at the least distance of distinct vision?
1. | \(5\) | 2. | \(10\) |
3. | \(100\) | 4. | none of the above |
1. | Only \(\frac{d}{4}\) |
2. | Only \(\frac{d}{2}\) |
3. | More than \(\frac{d}{4}\) but less than \(\frac{d}{2}\) |
4. | Less than or equal to \(\frac{d}{4}\) |
For the given incident ray as shown in the figure, in the condition of the total internal reflection of this ray, the minimum refractive index of the prism will be:
1. | \(\dfrac{\sqrt{3} + 1}{2}\) | 2. | \(\dfrac{\sqrt{2} + 1}{2}\) |
3. | \(\sqrt{\dfrac{3}{2}}\) | 4. | \(\sqrt{\dfrac{7}{6}}\) |