1. A
   $\angle r=30^\circ,\ \angle e=20^\circ$ and $\angle r=25^\circ,\ \angle e=45^\circ$
2. B
   $\angle r=20^\circ,\ \angle e=30^\circ$ and $\angle r=45^\circ,\ \angle e=28^\circ$
3. C
   $\angle r=30^\circ,\ \angle e=20^\circ$ and $\angle r=45^\circ,\ \angle e=28^\circ$
4. D
   $\angle r=20^\circ,\ \angle e=30^\circ$ and $\angle r=25^\circ,\ \angle e=45^\circ$

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1. A
   $2.1 \times 10^8$ m/s
2. B
   $2.5 \times 10^8$ m/s
3. C
   $1.2 \times 10^8$ m/s
4. D
   $25 \times 10^8$ m/s

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1. A
   virtual
2. B
   erect - down
3. C
   real
4. D
   diminished

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1. A
   0.25 m
2. B
   2 m
3. C
   0.5 m
4. D
   1 m

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1. A
   $+, -$
2. B
   $+, +$
3. C
   $-, -$
4. D
   $-, +$

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1. A
   increase
2. B
   remains the same
3. C
   decrease
4. D
   first increases and then decreases

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1. A
   Arrows of light
2. B
   Pool of light
3. C
   Beam of light
4. D
   Bunch of light

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1. A
   a distant tree
2. B
   All of these
3. C
   classroom window
4. D
   sun

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1. A
   the mirror and the screen
2. B
   the object and the screen
3. C
   the object and the mirror
4. D
   None of these

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1. A
   between focus and centre of curvature
2. B
   at a distance less than the focal length
3. C
   at a distance greater than radius of curvature
4. D
   at a distance equal to radius of curvature

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1. A
   Between F and 2F
2. B
   Equal to F
3. C
   More than 2F
4. D
   Less than F

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1. A
   material B
2. B
   material A
3. C
   material C
4. D
   material D

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1. A
   75 cm
2. B
   100 cm
3. C
   25 cm
4. D
   50 cm

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1. A
   on the table as per the lab arrangement
2. B
   on the wall adjacent to the window
3. C
   on the same wall as the window
4. D
   near the wall opposite to the window

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1. A
   in medium B
2. B
   in medium C
3. C
   in medium A
4. D
   in medium D

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1. A
   a lens and the object
2. B
   object and the screen
3. C
   lens and the screen
4. D
   None of these

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1. A
   Statement 1 is true but statement 2 is false.
2. B
   Both statements 1 and 2 are false.
3. C
   Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
4. D
   Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

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1. A
   Convex mirror as well as concave lens
2. B
   Two plane mirrors placed at $90^\circ$ to each other
3. C
   Concave mirror as well as convex lens
4. D
   Concave mirror as well as concave lens

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1. A
   pole and focus
2. B
   at focus
3. C
   focus and centre of curvature
4. D
   beyond focus

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1. A
   Concave mirror only
2. B
   Convex lens only
3. C
   Concave mirror, convex mirror, concave lens and convex lens
4. D
   Concave mirror, convex mirror

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1. A
   1.240
2. B
   1.327
3. C
   1.540
4. D
   1.603

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1. A
   Between the optical centre of the lens and its principal focus.
2. B
   Beyond twice the focal length of the lens.
3. C
   At the principal focus of the lens.
4. D
   At twice the focal length of the lens.

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1. A
   $\frac{2(f_1+f_2)}{2 f_1 \times f_2}$
2. B
   $\frac{f_1 \times f_2}{f_1+f_2}$
3. C
   $\frac{2 f_1 \times f_2}{f_1+f_2}$
4. D
   $\frac{f_1 \times f_2}{f_1 \times f_2}$

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1. A
   Yellow
2. B
   Green
3. C
   Red
4. D
   Violet

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1. A
   converges at 2f
2. B
   appears to diverge from focus
3. C
   converges at focus (f)
4. D
   appears to diverge from 2f

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