Science Practice Quiz 77

Q1.According to Table 9.1, what are the characteristics of the image formed by a concave mirror when the object is placed between the pole (P) and the principal focus (F)?

A. At infinity, image would not be formed B. Behind the mirror, enlarged, virtual and erect C. Between F and C, diminished, real and inverted D. At C, same size, real and inverted

Q2.When an object is placed at the principal focus (F) of a concave mirror, what is the position and nature of the image formed, as per Table 9.1?

A. At C, real and inverted B. Behind the mirror, virtual and erect C. At infinity, image would not be formed D. Between F and C, real and inverted

Q3.According to the laws of reflection for spherical mirrors, what happens to a ray of light passing through the principal focus of a concave mirror after reflection?

A. It passes through the centre of curvature. B. It emerges parallel to the principal axis. C. It is reflected back along the same path. D. It passes through the pole of the mirror.

Q4.When a ray of light passes through the centre of curvature of a concave mirror, how is it reflected?

A. It emerges parallel to the principal axis. B. It passes through the principal focus. C. It is reflected back along the same path. D. It is reflected obliquely, making equal angles with the principal axis.

Q5.Why does a ray of light passing through the centre of curvature of a spherical mirror reflect back along the same path?

A. Because it emerges parallel to the principal axis. B. Because the incident rays fall on the mirror along the normal to the reflecting surface. C. Because it makes equal angles with the principal axis. D. Because it passes through the principal focus after reflection.

Q6.What happens to a ray of light incident obliquely to the principal axis, towards the pole (P) of a concave mirror?

A. It passes through the principal focus. B. It emerges parallel to the principal axis. C. It is reflected obliquely. D. It is reflected back along the same path.

Q7.When a ray is incident obliquely to the principal axis towards the pole of a spherical mirror, what is true about the incident and reflected rays?

A. They make unequal angles with the principal axis. B. They follow the laws of reflection, making equal angles with the principal axis. C. They always pass through the principal focus. D. They always emerge parallel to the principal axis.

Q8.What fundamental principle is followed at the point of incidence when light rays reflect from a spherical mirror?

A. The angle of refraction equals the angle of incidence. B. The angle of reflection is always greater than the angle of incidence. C. The angle of reflection equals the angle of incidence. D. The ray always passes through the principal focus.

Q9.Which of the following applications commonly uses a concave mirror?

A. Rear-view mirrors in vehicles B. Street lights C. Torches D. Periscopes

Q10.For what primary purpose do dentists use concave mirrors?

A. To focus light on the patient's face B. To see a larger image of the patient's teeth C. To reflect light into the patient's mouth D. To reduce glare from dental instruments

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Science Practice Quiz 77