# The angle of incidence for a ray of light at a refracting surface of a prism is 45°. The angle of prism is 60°. If the ray suffers minimum deviation through the prism, the angle of deviation and refracting index of the material of the prism respectively are (a)30°,$\sqrt{2}$ (b)45°,$\sqrt{2}$ (c)30°,$\frac{1}{\sqrt{2}}$ (d)45°,$\frac{1}{\sqrt{2}}$

Subtopic:  Prisms |
71%
From NCERT
NEET - 2016
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Match the corresponding entries of Column 1 with Column 2. [Where m is the magnification produced by the mirror]

Column 1                         Column 2
A. m=-2                     a. Convex mirror
B. m=-1/2                  b. Concave mirror
C. m=+2                    c. Real image
D. m=+1/2                 d. Virtual Image

(1)A->a and c;B->a and d; C->a and b; D->c and d

(2)A->a and d; B->b and c; C->b and d; D-> b and c

(3)A->c and d; B->b and d;C->b and c;D->a and d

(4)A->b and c; B->b and c; C->b and d; D->a and d

Subtopic:  Reflection at Spherical Surface |
61%
From NCERT
NEET - 2016
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Two identical glass $\left({\mu }_{g}=3/2\right)$ equi-convex lenses of focal length $f$ each are kept in contact. The space between the two lenses is filled with water $\left({\mu }_{w}=4/3\right)$. The focal length of the combination is

(a)  $f/3$             (b) $f$

(c) $\frac{4f}{3}$               (d) $\frac{3f}{4}$

Subtopic:  Lenses |
56%
From NCERT
NEET - 2016
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The refractive index of the material of a prism is and the angle of the prism is $$30^\circ.$$ One of the two refracting surfaces of the prism is made a mirror inwards with a silver coating. A beam of monochromatic light entering the prism from the other face will retrace its path (after reflection from the silvered surface) if the angle of incidence on the prism is:
1. $$60^\circ$$
2. $$45^\circ$$
3. $$30^\circ$$
4. zero

Subtopic:  Prisms |
71%
From NCERT
NEET - 2018
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

An object is placed at a distance of $$40$$ cm from a concave mirror of a focal length of $$15$$ cm. If the object is displaced through a distance of $$20$$ cm towards the mirror, the displacement of the image will be:

 1 $$30$$ cm away from the mirror 2 $$36$$ cm away from the mirror 3 $$30$$ cm towards the mirror 4 $$36$$ cm towards the mirror

Subtopic:  Reflection at Spherical Surface |
74%
From NCERT
NEET - 2018
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A beam of light from a source $$L$$ is incident normally on a plane mirror fixed at a certain distance $$x$$ from the source. The beam is reflected back as a spot on a scale placed just above the source $$L$$. When the mirror is rotated through a small angle $$\theta,$$ the spot of the light is found to move through a distance $$y$$ on the scale. The angle $$\theta$$ is given by:
1. $$\frac{y}{x}$$
2. $$\frac{x}{2y}$$
3. $$\frac{x}{y}$$
4. $$\frac{y}{2x}$$

Subtopic:  Reflection at Plane Surface |
54%
From NCERT
NEET - 2017
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A thin prism having refracting angle $$10^\circ$$ is made of glass of a refractive index $$1.42$$. This prism is combined with another thin prism of glass with a refractive index $$1.7$$. This combination produces dispersion without deviation. The refracting angle of the second prism should be:
1. $$6^{\circ}$$
2. $$8^{\circ}$$
3. $$10^{\circ}$$
4. $$4^{\circ}$$

Subtopic:  Prisms |
66%
From NCERT
NEET - 2017
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

An air bubble in a glass slab with a refractive index $$1.5$$ (near-normal incidence) is $$5$$ cm deep when viewed from one surface and $$3$$ cm deep when viewed from the opposite surface. The thickness (in cm) of the slab is:
1.  $$8$$
2. $$10$$
3. $$12$$
4. $$16$$

Subtopic:  Refraction at Plane Surface |
75%
From NCERT
NEET - 2016
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A person can see objects clearly only when they lie between $$50$$ cm and $$400$$ cm from his eyes. In order to increase the maximum distance of distinct vision to infinity, the type and power of the correcting lens, the person has to use, will be:

 1 convex, $$+2.25$$ D 2 concave, $$-0.25$$ D 3 concave, $$-0.2$$ D 4 convex, $$+0.5$$ D
Subtopic:  Human Eye |
72%
From NCERT
NEET - 2016
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

An astronomical refracting telescope will have large angular magnification and high angular resolution when it has an objective lens of:

 1 small focal length and large diameter. 2 large focal length and small diameter. 3 large focal length and large diameter. 4 small focal length and small diameter.

Subtopic:  Telescope |
59%
From NCERT
NEET - 2018
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints