What should be the angle between two plane mirror, if an object placed symmetrically between them has five images?

(1) 75°

(2) 60°

(3) 120°

(4) 59°

Subtopic:  Reflection at Plane Surface |
 79%
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The maximum magnification which can be obtained with the help of a simple microscope is 6. If a point object is placed at distance 3 cm from the microscope, then what was be the position of the image?

(1) -7.5 cm

(2) -6.4 cm

(3) 8.2 cm

(4) 5.45 cm

Subtopic:  Simple & Compound Microscope |
 69%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

A converging spherical wavefront is obtained from

(1) Light emerging from a convex lens when a point source is placed at its focus

(2) A parallel beam of light incident on the convex lens

(3) Light converging at a point

(4) Both (2) & (3)

Subtopic:  Lenses |
 77%
From NCERT
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A concave lens of glass of refractive index 1.5 has both surfaces of the same radius of curvature R. On immersion in a medium of refractive index 1.75, it will have as a

1. Divergent lens of focal length 3R

2. Divergent lens of focal length 4R

3. Convergent lens of focal length 3.5R

4. Convergent lens of focal length 5R

Subtopic:  Refraction at Curved Surface |
 73%
From NCERT
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A ray is incident normally on a right-angled prism whose R.I is 3 and prism angle A=30°. Deviation to the ray is equal to

(1) π2

(2) π6

(3) 3π2

(4) 2π

Subtopic:  Prisms |
 65%
From NCERT
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A convex lens forms the image of a point object \(O\) on the screen. If a glass slab of thickness 3 cm and refractive index 1.5 is put as shown below, then to have the image of the object on the screen, the object should be shifted:

  

1. away from the lens by 1 cm
2. away from the lens by 1.5 cm
3. towards the lens by 1 cm
4. towards the lens by 1.5 cm
Subtopic:  Refraction at Curved Surface |
 52%
From NCERT
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Two convex lenses of focal lengths f1 and f2 are separated co-axially by a distance d. The power of the combination will be zero if d equals to

1. f1f2

2. f1+f2

3. f1-f22

4. f1+f22

Subtopic:  Lenses |
 69%
From NCERT
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In the following diagram what is the distance x if the radius of curvature R=15 cm?

(1) 30 cm

(2) 20 cm

(3) 15 cm

(4) 10 cm

Subtopic:  Refraction at Curved Surface |
 74%
From NCERT
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A thin equiconvex lens of power P is cut into three parts A, B, and C as shown in the figure. If P1, P2 and P3 are powers of the three parts respectively, then 

1.  P1 = P2 = P3

2.  P1 > P2 = P3

3.  P1 < P2 = P3

4.  P2 = P3 = 2P1

 

Subtopic:  Lenses |
 72%
From NCERT
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In the diagram shown below, the image of the point object O is formed at l by the convex lens of focal length 20 cm, where F1 and F2 are foci of the lens. The value of x' is

(1) 10 cm

(2) 20 cm

(3) 30 cm

(4) 40 cm

Subtopic:  Lenses |
 68%
From NCERT
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