A beam of light of wavelength 590 nm is focused by a convex lens of diameter 10 cm at a distance of 20 cm from it. Find the diameter of the disc image formed.
1 Answers
Talk Doctor Online in Bissoy App
Two wavelength of sodium light `590 nm` and `596 nm` are used, in turn, to study the diffraction taking placed at a single slit of aperture `2 xx 10^(
(a) If the width of each slit is comparable to the wavelength of light used, the interference pattern thus obtained in the double-slit experiment is modified by diffraction from each...
2 Answers 1 views
A laser beam has a wavelength of `6xx10^(-7)`m and aperture of `6xx10^(-2)`m. The beam is sent towards the moon which is at a distance of `4xx10^(8)`m
Correct Answer - (i)`1.22xx10^(-5)rad(ii) 2.381xx10^(7)`m
2 Answers 1 views
A laser beam has a power of 100 mW. It has an aperture of `5xx10^(-3)`m and emits a wavelength 6943 Å. The beam is focused with a lens of focal length
Correct Answer - `2.87xx10^(-10)m^(2),3.48xx10^(8)Wm^(-2)`
2 Answers 1 views
The redius of curvature of the convex face of a plano-convex lens is 12cm and its refractive index is 1.5. a. Find the focal length of this lens. The
Correct Answer - (a) `+24 cm`; (b) `- 36cm` (c) `12 cm`(d) `- 180 cm`
2 Answers 1 views
A double convex lens is placed on a horizontal plane mirror. A pin held horizontally above the lens coincides with its own image when it is 18cm from
Correct Answer - 1.48
2 Answers 7 views
A convex lens of focal length `15 cm` is placed in front of a convex mirror. Both are coaxial and the lens is `5 cm` from the apex of the mirror. When
Correct Answer - 55 cm
2 Answers 1 views
A convex lens is placed on an optical bench and is moved till it gives a real image of an object at a minimum distance of 80 cm from the latter. Find
Correct Answer - `f = 20`, virtual and erect image at 60 cm from the lens on the same side as the object
2 Answers 3 views
An object is 60 cm in front of a thin lens, the image being 300 cm on the other side of the lens. Calculate the displacement of the image, when the ob
Correct Answer - 500 cm
2 Answers 2 views
Find the focal length and power of a convex lens, which when placed in contact with a concave lens of focal length `25 cm` forms a real image `5` time
Correct Answer - 10 cm, 10D
2 Answers 1 views
If first wave of feminism was focused on Right to vote, the second wave of feminism was focused on
A) Education and health
2 Answers 1 views