Practice Test

Q1) A concave mirror has a focal length of 2 metre in vacuum. What would be its focal length when used in medium of refractive index 2.759 ? Show Answer

Q2) A convex mirror is used to form an image of a real object. Which of the following is wrong ? Show Answer

Q3) While using an electric bath, the reflector for street lighting should be Show Answer

Q4) A dice is placed with its one edge parallel to the principal axis between the principal focus and the centre of the curvature of a concave mirror. The shape of the image is Show Answer

Q5) A person standing in front of a mirror finds his image larger than himself. This implies that the mirror is Show Answer

Q6) The largest distance of the image from a convex mirror of focal length 10 cm can be Show Answer

Q7) A car is fitted with a convex mirror of focal length 20 cm. A second car 2 m broad and 1.6 m high is 6 m away from the first car. The position of the second car as seen in the mirror of the first car is Show Answer

Q8) In the above question, the breadth and height of the second car seen in the mirror of the first car, are respectively Show Answer

Q9) A person is looking at the image of his face in a mirror by holding it close to his face. The image is virtual. When he moves the mirror away from his face, the image is inverted. What type of mirror is he using ? Show Answer

Q10) For a real object, a convex mirror always forms an image which is Show Answer

Q11) A convex mirror forms an image one fourth the size of the object. If object is at a distance of 0.5 mm from the mirror, the focal length of mirror is Show Answer

Q12) A dentist has a small mirror of focal length 16 mm. He views the cavity in the tooth of a patient by holding the mirror at a distance of 8 mm from the cavity. The magnification is Show Answer

Q13) A person 6 feet in height can see his full size erect image in a mirror 2 feet in height. This mirror has to be Show Answer

Q14) A concave mirror has radius of curvature of 1 m. Light from a distant star is incident on the mirror. The distance of the image of the star from the mirror is Show Answer

Q15) A spherical mirror forms an image of magnification 3. The object distance, if focal length of mirror is 24 cm, may be Show Answer

Q16) A concave mirror of focal length forms an image of the same size as the object. The distance of the object from the mirror is Show Answer

Q17) A point object is placed at a distance of 30 cm from a convex mirror of focal length 30 cm. The image will form at Show Answer

Q18) An object is placed at a distance of 10 cm from a concave mirror of radius of curvature 0.6 m. Which of the following statements is incorrect Show Answer

Q19) A convex mirror has a focal length of 20 cm. A real object is placed at a distance of 20 cm in front of the mirror from the pole. The mirror produces an image at Show Answer

Q20) A man has a concave shaving mirror of focal length 0.2 m. How far should the mirror be held from his face in order to give an image of two fold magnification ? Show Answer

Q21) A concave mirror, forms a real image of an object. If the whole arrangement is immersed in water. Then the image will Show Answer

Q22) A mirror forms a virtual image of unit magnification. Its nature is Show Answer

Q23) A luminous object is placed 20 cm from the surface of a convex mirror. A plane mirror is set so that the virtual images formed in the two mirrors coincide. If the plane mirror is at a distance of 12 cm from the object, then the focal length of the convex mirror is Show Answer

Q24) The focal length of a concave mirror is 12 cm. Where should an object of length 4 cm be placed so that an image 1 cm long is formed ? Show Answer

Q25) The focal length of a concave mirror is 20 cm. Where an object must be placed to form an image magnified two times when the image is real ? Show Answer

Q26) In the previous question, if the magnified image is virtual, then the distance of the object from the mirror must be Show Answer

Q27) The image formed by a convex mirror of focal length 20 cm is half the size of the object. Then, the distance of the object from the mirror is Show Answer

Q28) An object 3 cm tall is placed on the principal axis of a concave mirror of focal length 9 cm at a distance of 12 cm from it. What is the nature and size of the image ? Show Answer

Q29) A convergent beam of light coverages to a point 20 cm behind the convex mirror on the principal axis. An inverted image of the same size is formed coincident with the virtual object. Then, the focal length of the convex mirror is Show Answer

Q30) A convex mirror has a focal length 20 cm. A convergent beam of light converges to a point 20 cm behind the convex mirror on the principal axis. The image is formed at Show Answer

Q31) The field of view is maximum for Show Answer

Q32) An object is placed at a distance of 25 cm from the pole of a convex mirror and a plane mirror is set so that the virtual images formed by two mirrors do not have any parallax. The plane mirror is 20 cm form the object,. The focal length of the mirror is Show Answer

Q33) A convex mirror of radius of curvature 1.6 m has an object placed at a distance of 1 m from it. The image is formed at a distance of Show Answer

Q34) A spherical mirror forms a real image of a point object placed in front. The distance of the image and object from the mirror is 30 cm and 0.2 m respectively. The focal length and nature of the mirror are Show Answer

Q35) An object 5 cm tall is placed 1 m from a concave spherical mirror which has a radius of curvature of 20 cm. The size of the image is Show Answer

Q36) A concave mirror is used to form an image of the sun on a white screen. If the lower half of the mirror were covered with an opaque card, the effect on the image on he screen would be Show Answer

Q37) The image of an object placed on the principal axis of a concave mirror of focal length 12 cm is formed at a point which is 20 cm more distant from the mirror than the object. The magnifications of the image is Show Answer

Q38) Statement 1 : In a convex mrror images produced are always virtual.
Statement 2 : For a convex mirror, focal length is positive.
Show Answer

Q39) Statement 1 : A concave mirror can be used as a rearview mirror.
Statement 2 : If object is close, image by a concave mirror is virtual
Show Answer

Q40) At what distance from the mirror should be a screen be placed in order to receive a sharp image ? Show Answer

Q41) The size of the image is Show Answer

Q42) The nature of the image is Show Answer

Q43) Statement 1 : A dentist uses a concave mirror to examine a small cavity.
Statement 2 : A concave mirror always forms a magnified and erect image.
Show Answer

Q44) Statement 1 : Light from an object falls on a concave mirror forming a real image of the object. If both the object and mirror are immersed in water. There is no change in the position of the image.
Statement 2 : The formation of image by reflection does not depend on surrounding medium, there is no change in position of image provided it is also formed in water.
Show Answer

Q45) The length of the image along the axis is Show Answer

Q46) Magnification along the axis is Show Answer

Q47) The height of the image is Show Answer

Q48) A diminished virtual image can be formed only in Show Answer

Q49) Which of the following could not produce a virtual image Show Answer

Q50) An object 5 m tall is placed 1 m from a concave spherical mirror which has a radius of curvature of 20 cm. The size of the image is Show Answer

Q51) The focal length of a concave mirror is 50 cm. Where an object be placed so that its image is two times and inverted Show Answer

Q52) An object of size 7.5 cm is placed in front of a convex mirror of radius of curvature 25 cm at a distance of 40 cm. The size of the image should be Show Answer

Q53) Image formed by a convex mirror is Show Answer

Q54) A convex mirror is used to form the image of an object. Then which of the following statements is wrong Show Answer

Q55) Given a point source of light, which of the following can produce a parallel beam of light Show Answer

Q56) The image formed by a convex mirror of focal length 30 cm is a quarter of the size of the object. The distance of the object from the mirror is Show Answer

Q57) A person sees his virtual image by holding a mirror very close to the face. When he moves the mirror away from his face, the image becomes inverted. What type of mirror he is using Show Answer

Q58) Which one of the following statements is true Show Answer

Q59) While using an electric bulb, the reflection for street lighting should be from Show Answer

Q60) A concave mirror is used to focus the image of a flower on a nearby well 120 cm from the flower. If a lateral magnification of 16 is desired, the distance of the flower from the mirror should be Show Answer

Q61) A virtual image larger than the object can be obtained by Show Answer

Q62) An object is placed 40 cm from a concave mirror of focal length 20 cm. The image formed is Show Answer

Q63) A virtual image three times the size of the object is obtained with a concave mirror of radius of curvature 36 cm. The distance of the object from the mirror is Show Answer

Q64) Radius of curvature of concave mirror is 40 cm and the size of image is twice as that of object, then the object distance is Show Answer

Q65) All of the following statements are correct except Show Answer

Q66) If an object is placed 10 cm infront of a concave mirror of focal length 20 cm the image will be Show Answer

Q67) Which of the following form(s) a virtual and erect image for all positions of the object Show Answer

Q68) An object 1 cm tall is placed 4 cm infront of a mirror. In order to produce an upright image of 3 cm height one needs a Show Answer

Q69) A concave mirror gives an image three times as large as the object placed at a distance of 20 cm from it. For the image to be real, the focal length should be Show Answer

Q70) The minimum distance between the object and its real image for concave mirror is Show Answer

Q71) An object is placed at 20 cm from a convex mirror of focal length 10 cm. The image formed by the mirror is Show Answer

Q72) A point object is placed at a distance of 10 cm and its real image is formed at a distance of 20 cm from a concave mirror. If the object is moved by 0.1 cm towards the mirror, the image will shift by about Show Answer

Q73) Under which of the following conditions will a convex mirror of focal length f produce an image that is erect, diminished and virtual Show Answer

Q74) The focal length of a convex mirror is 20 cm its radius of curvature will be Show Answer

Q75) A concave mirror of focal length 15 cm forms an image having twice the linear dimensions of the object. The position of the object when the image is virtual will be Show Answer

Q76) A point object is placed at a distance of 30 cm from a convex mirror of focal length 30cm. The image will form at Show Answer

Q77) An object 2.5 cm high is placed at a distance of 10 cm from a concave mirror of radius of curvature 30 cm The size of the image is Show Answer

Q78) For a real object, which of the following can produced a real image Show Answer

Q79) Convergence of concave mirror can be decreased by dipping in Show Answer

Q80) What will be the height of image when an object of 2 mm is placed on the axis of a convex mirror at a distance 20 cm of radius of curvature 40 cm Show Answer

Q81) Image formed by a concave mirror of focal length 6 cm, is 3 times of the object, then the distance of object from mirror is Show Answer