A parallel beam of monochromatic light f...

A parallel beam of monochromatic light falls on a combination of a convex lens and a concave lens of focal lengths 15 cm and 5 cm respectively. What is the distance between the two lenses to obtain a parallel beam of light from the concave lens ?

20 cm

3 cm

10 cm

45 cm

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

RAY OPTICS AND OPTICAL INSTRUMENTS
AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (SECTION - A)|39 Videos
RAY OPTICS AND OPTICAL INSTRUMENTS
AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (SECTION - B)|35 Videos
RAY OPTICS AND OPTICAL INSTRUMENTS
AAKASH INSTITUTE ENGLISH|Exercise EXAMPLE|75 Videos
PHYSICAL WORLD
AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (Section-B)|4 Videos
SEMICONDUCTOR ELECTRONICS (MATERIAL, DEVICES AND SIMPLE CIRUITS )
AAKASH INSTITUTE ENGLISH|Exercise Assignment SECTION - D (Assertion & reason type Question)|10 Videos

Similar Questions

Explore conceptually related problems

A parallel beam of white light falls on a combination of a concave and a convex lens, both of the same material. Their foacl lengths are 15cm and 30cm, respectively for the mean wavelength in white light. On the other side of the lens system, one sees colored patterns with violet color at the outer edge.

What is the optical power in dioptre of a concave lens of focal length 50 cm?

A convex lens A of focal length 20cm and a concave lens B of focal length 10 cm are kept along the same axis with a distance d between them. If a parallel beam, then d is

A parallel beam of light is incident on the system of two convex lenses of focal length f_(1)=20cm and f_(2)=10cm . What should be the distance between the two lenses so that rays after refraction from both the lenses pass undeviated?

A convex lens of focal length 80 cm and a concave lens of focal length 50 cm are combined toghether. What will be their resulting power ?

A convex lens A of focal length 20cm and a concave lens G of focal length 5cm are kept along the same axis with the distance d between them. If a parallel beam of light falling on A leaves B as a parallel beam, then distance d in cm will be

How are power and focal length of a lens related ? You are provided with two lenses of focal length 20 cm and 40 cm respectively. Which lens will you use to obtain more convergent light ?

Distance of an object from a concave lens of focal length 20 cm is 40 cm. Then linear magnification of the image

A convex lens of focal length A and a concave lens of focal length B are placed in contact. The focal length of the combination is

AAKASH INSTITUTE ENGLISH-RAY OPTICS AND OPTICAL INSTRUMENTS-EXERCISE

Light takes t(1) second to travel a distance x cm in vacuum and the sa...
Text Solution
|
A fish is a little away below the surface of a take. If the critical a...
Text Solution
|
A parallel beam of monochromatic light falls on a combination of a con...
Text Solution
|
Three lenses in contact have a combined focal length of 12 cm. When th...
Text Solution
|
The radii of curvatures of a convex lens are 0.04 m and 0.04m. Its ref...
Text Solution
|
A convex glass lens (mu(g) = 1.5) has a focal length of 8 cm when plac...
Text Solution
|
A convex mirror forms an image one-fourth the size of the object. If o...
Text Solution
|
A travelling microscope is focussed on to a scratch on the bottom of a...
Text Solution
|
While a moving picture is being screened, a boy introduced a glass sla...
Text Solution
|
For a plano convex lens, the radius of curvature of convex surface is ...
Text Solution
|
A lens made of material of Refractive index mu(2) is surrounded by a m...
Text Solution
|
A light ray is incident normally on one of the refracting faces of a p...
Text Solution
|
If a light ray incidents normally on one of the faces of the prism of ...
Text Solution
|
A ray of light is incident on one of the faces of the angle prism with...
Text Solution
|
A prism of refractive index sqrt2 has refractive angle 60^@. In the or...
Text Solution
|
The least angle of deviation for a glass prism is equal to its refract...
Text Solution
|
A light ray of angles of incidence 40^(@) emerged from the prism in mi...
Text Solution
|
The angle of minimum deviation for a 75^(@) prism of dense glass is fo...
Text Solution
|
Suppose a small angled prism of 6^(@) deviates a ray through 3^(@), th...
Text Solution
|
For a given prism thetaanddelta are angular dispersion and deviation. ...
Text Solution
|