Chapter 2: Optics - Online Test

Q1. The refractive index of four substances A, B, C and D are 1.31, 1.43, 1.33, 2.4 respectively. The speed of light is maximum in
Answer : Option A
Explaination / Solution:
No Explaination.


Q2. Where should an object be placed so that a real and inverted image of same size is obtained by a convex lens
Answer : Option B
Explaination / Solution:
No Explaination.


Q3. A small bulb is placed at the principal focus of a convex lens. When the bulb is switched on, the lens will produce
Answer : Option C
Explaination / Solution:
No Explaination.


Q4. Magnification of a convex lens is
Answer : Option C
Explaination / Solution:
No Explaination.


Q5. A convex lens forms a real, diminished point sized image at focus. Then the position of the object is at
Answer : Option B
Explaination / Solution:
No Explaination.


Q6. Power of a lens is –4D, then its focal length is
Answer : Option C
Explaination / Solution:
No Explaination.


Q7. In a myopic eye, the image of the object is formed
Answer : Option C
Explaination / Solution:
No Explaination.


Q8. The eye defect ‘presbyopia’ can be corrected by
Answer : Option D
Explaination / Solution:
No Explaination.


Q9. Which of the following lens would you prefer to use while reading small letters found in a dictionary?
Answer : Option A
Explaination / Solution:
No Explaination.


Q10. If VB, VG, VR be the velocity of blue, green and red light respectively in a glass prism, then which of the following statement gives the correct relation?
Answer : Option C
Explaination / Solution:
No Explaination.