Physics

posted by .

A converging thin lens made out of crown glass (n=1.52) has a focal length f=1.0m An identical lens (same radius for the spherical surfaces), made out of a high-index plastic with n=1.70 will be ...

A. Converging with a focal length smaller than 1.0 m
B. Diverging with a focal length smaller than 1.0 m
C. Converging with a focal length exactly equal to 1.0 m
D. Converging with a focal length larger than 1.0 m
E. Diverging with a focal length larger than 1.0 m

  • Physics -

    Look up the lens maker's formula and decide for yourself.

    The high-index plastic will have a shorter focal length than the glass lens with the same shape.

    Focal length is inversely proportional to n-1.

  • Physics -

    oh k. got it. thanks

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physic please help!

    A converging lens has a focal length of 0.060 m. An object is located 0.020 m to the left of this lens. A second converging lens has the same focal length as the first one and is located 0.100 m to the right of it. Relative to the …
  2. Science Important

    1. A toy of height 18.4 cm is balanced in front of a converging lens. An inverted, real image of height 33 cm is noticed on the other side of the lens. What is the magnification of the lens?
  3. physics

    Hi! could any help me please, thank you. 1.An object is placed 17.8 cm from a first converging lens of focal length 13 cm. A second converging lens with focal length 24 cm is placed 10 cm to the right of the first converging lens. …
  4. physics

    Please, anyone help me please. Q: An object is placed 17.8 cm from a first converging lens of focal length 13 cm. A second converging lens with focal length 24 cm is placed 10 cm to the right of the first converging lens. (Take the …
  5. Physica

    A contact lens is made of plastic with an index of repraction of 1.5 , The lens has an outer radius of eurvature ( convex) of 2 cm and an inner radius of curvature (concave ) of 4 cm .the focal length of the lens is;
  6. physics

    A parallel beam of light is incident on diverging lens of focal length 12cm. The emergent beam passes through a converging lens of focal length 20cm placed coaxial with it. The beam which finally emerges from the converging lens,comes …
  7. Physics

    Two systems are formed from a converging lens and a diverging lens, as shown in parts a and b of the drawing. (The point labeled "Fconverging" is the focal point of the converging lens.) An object is placed inside the focal point of …
  8. Physics

    A lighted candle is placed 38 cm in front of a diverging lens. The light passes through the diverging lens and on to a converging lens of focal length 10 cm that is 5 cm from the diverging lens. The final image is real, inverted, and …
  9. physics

    The convex meniscus lens has a 15cm radius for the convex surface and 20cm for the concave surface. The lens is made of crown glass with refractive index, n=1.52 and is surrounded by air. What is the focal length of the lens.
  10. Physics

    An object is placed 20.0 cm from a thin converging lens along the axis of the lens. If a real image forms behind the lens at a distance of 8.00 cm from the lens, what is the focal length of the lens?

More Similar Questions