Question

Among the following that produce virtual as well as real image is
Concave lens and convex mirror
b) Convex mirror and convex lens
c) Convex lens and concave mirror
d) Convex mirror and concave lens​

Answer 1

Explanation:

c)convex lens and concave mirror

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Answer 2

Among the following given options, Concave Mirror and Convex lens produce virtual as well as a real image.

Option (c) Convex lens and concave mirror is correct.

Options a) Concave lens and convex mirror, b) Convex mirror and convex lens, and d) Convex mirror and concave lens​ are incorrect because only Convex lens and concave mirror form virtual as well as a real image.

• Concave mirror → Real as well as virtual
• convex mirror → Virtual and Erect
• Concave lens → Virtual and Erect
• Convex lens → Real as well as virtual

Explanation of image formation by Concave Mirror, Convex mirror concave lens, and Convex lens:

Image Formation By Concave Mirror:

Position of Object →Position of Image→ Size of Image→ Nature of Image

1. At infinity → At the focus F → Highly Diminished → Real and Inverted
2. Beyond the center of curvature C → Between F and C → Diminished → Real and Inverted
3. At the center of curvature C → At C → Same Size → Real and Inverted
4. Between C and F → Beyond C → Enlarged → Real and Inverted
5. At focus F → At Infinity → Highly Enlarged → Real and Inverted
6. Between the principal focus F and pole P → Behind the same → magnified → Virtual and erect

Image Formation By Convex Mirror:

Position Of Object → Position of Image → Size of Image → Nature of Image

1. At Infinity → At the focus F, behind the mirror → Highly diminished → Virtual and Erect
2. Between Infinity and the Pole → Between P and F, behind the mirror → Diminished →  Virtual and Erect                        

Image formation by Concave Lens

Object Location → Image Location → Image Nature → Image Size

1. Infinity  → At F1  → Virtual and Erect → Highly diminished, point-sized
2. Beyond Infinity and Optical Centre → Between Focus (F1) and Optical center (O)  → Virtual and Erect → Diminished

Image formation by Convex Lens:

Object location → Image location → Image  nature → Image size

1. Infinity → At F2 → Real and Inverted → Diminished, point sized
2. Beyond 2F1  → Between 2F2 and F2 → Real and Inverted → Diminished
3. Between 2F1 and F1 → Beyond 2F2 → Real and Inverted → Enlarged
4. At F1 → At infinity → Real and Inverted → Infinitely large or highly enlarged
5. At 2F1 → At 2F2 → Real and Inverted → Same size
6. Between F1 and O  → On the same side as the object → Virtual and Erect → Enlarged

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