364727
If a spherical mirror is immersed in a liquid it’s focal length will
1 Increase
2 Decrease
3 Remain unchanged
4 Depend on the nature of liquid
Explanation:
Conceptual Question
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS
364728
In the figure shown if the object ' \(O\) ' moves towards the plane mirror, then the image \(I\) (which is formed after successive reflections from \({M_1}\& {M_2}\) respectively) will move: (Given mirrors are fixed)
1 Towards right
2 Towards left
3 With zero velocity
4 Cannot be determined
Explanation:
\(I\) will be object for concave mirror \(\Rightarrow \dfrac{v_{I}}{M_{2}}=-\left[\dfrac{v}{u}\right]^{2}\left(\dfrac{v_{O}}{M_{2}}\right)\)
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS
364729
The direction of ray of light incident on a concave mirror is shown by \(PQ\) by four rays marked 1,2, 3 and 4 (figure). Which of the four rays correctly shows the direction of reflected ray?
1 2
2 1
3 4
4 3
Explanation:
The PQ ray of light passes through focus \(F\) and incident on the concave mirror, after reflection, the ray should become parallel to the principal axis
NCERT EXEMPLAR
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS
364730
Statement A : The radius of curvature of a mirror is double of the focal length. Statement B : A concave mirror of focal length \(f\) in air is used in a medium of refractive index 2. Then the focal length of mirror in medium becomes 2\(f\).
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
\(R = 2f,\)so statement A is correct. Focal length of a mirror does not depend on medium. Statement B is incorrect. So option (1) is correct.
NEET Test Series from KOTA - 10 Papers In MS WORD
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PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS
364727
If a spherical mirror is immersed in a liquid it’s focal length will
1 Increase
2 Decrease
3 Remain unchanged
4 Depend on the nature of liquid
Explanation:
Conceptual Question
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS
364728
In the figure shown if the object ' \(O\) ' moves towards the plane mirror, then the image \(I\) (which is formed after successive reflections from \({M_1}\& {M_2}\) respectively) will move: (Given mirrors are fixed)
1 Towards right
2 Towards left
3 With zero velocity
4 Cannot be determined
Explanation:
\(I\) will be object for concave mirror \(\Rightarrow \dfrac{v_{I}}{M_{2}}=-\left[\dfrac{v}{u}\right]^{2}\left(\dfrac{v_{O}}{M_{2}}\right)\)
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS
364729
The direction of ray of light incident on a concave mirror is shown by \(PQ\) by four rays marked 1,2, 3 and 4 (figure). Which of the four rays correctly shows the direction of reflected ray?
1 2
2 1
3 4
4 3
Explanation:
The PQ ray of light passes through focus \(F\) and incident on the concave mirror, after reflection, the ray should become parallel to the principal axis
NCERT EXEMPLAR
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS
364730
Statement A : The radius of curvature of a mirror is double of the focal length. Statement B : A concave mirror of focal length \(f\) in air is used in a medium of refractive index 2. Then the focal length of mirror in medium becomes 2\(f\).
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
\(R = 2f,\)so statement A is correct. Focal length of a mirror does not depend on medium. Statement B is incorrect. So option (1) is correct.
364727
If a spherical mirror is immersed in a liquid it’s focal length will
1 Increase
2 Decrease
3 Remain unchanged
4 Depend on the nature of liquid
Explanation:
Conceptual Question
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS
364728
In the figure shown if the object ' \(O\) ' moves towards the plane mirror, then the image \(I\) (which is formed after successive reflections from \({M_1}\& {M_2}\) respectively) will move: (Given mirrors are fixed)
1 Towards right
2 Towards left
3 With zero velocity
4 Cannot be determined
Explanation:
\(I\) will be object for concave mirror \(\Rightarrow \dfrac{v_{I}}{M_{2}}=-\left[\dfrac{v}{u}\right]^{2}\left(\dfrac{v_{O}}{M_{2}}\right)\)
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS
364729
The direction of ray of light incident on a concave mirror is shown by \(PQ\) by four rays marked 1,2, 3 and 4 (figure). Which of the four rays correctly shows the direction of reflected ray?
1 2
2 1
3 4
4 3
Explanation:
The PQ ray of light passes through focus \(F\) and incident on the concave mirror, after reflection, the ray should become parallel to the principal axis
NCERT EXEMPLAR
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS
364730
Statement A : The radius of curvature of a mirror is double of the focal length. Statement B : A concave mirror of focal length \(f\) in air is used in a medium of refractive index 2. Then the focal length of mirror in medium becomes 2\(f\).
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
\(R = 2f,\)so statement A is correct. Focal length of a mirror does not depend on medium. Statement B is incorrect. So option (1) is correct.
364727
If a spherical mirror is immersed in a liquid it’s focal length will
1 Increase
2 Decrease
3 Remain unchanged
4 Depend on the nature of liquid
Explanation:
Conceptual Question
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS
364728
In the figure shown if the object ' \(O\) ' moves towards the plane mirror, then the image \(I\) (which is formed after successive reflections from \({M_1}\& {M_2}\) respectively) will move: (Given mirrors are fixed)
1 Towards right
2 Towards left
3 With zero velocity
4 Cannot be determined
Explanation:
\(I\) will be object for concave mirror \(\Rightarrow \dfrac{v_{I}}{M_{2}}=-\left[\dfrac{v}{u}\right]^{2}\left(\dfrac{v_{O}}{M_{2}}\right)\)
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS
364729
The direction of ray of light incident on a concave mirror is shown by \(PQ\) by four rays marked 1,2, 3 and 4 (figure). Which of the four rays correctly shows the direction of reflected ray?
1 2
2 1
3 4
4 3
Explanation:
The PQ ray of light passes through focus \(F\) and incident on the concave mirror, after reflection, the ray should become parallel to the principal axis
NCERT EXEMPLAR
PHXII09:RAY OPTICS AND OPTICAL INSTRUMENTS
364730
Statement A : The radius of curvature of a mirror is double of the focal length. Statement B : A concave mirror of focal length \(f\) in air is used in a medium of refractive index 2. Then the focal length of mirror in medium becomes 2\(f\).
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
\(R = 2f,\)so statement A is correct. Focal length of a mirror does not depend on medium. Statement B is incorrect. So option (1) is correct.
