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

Question

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

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 0.1 m. Calculate the areal spread and intensity of the image.

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

Related Questions

Prove that `^100 C_2^(100)C_2+^(100)C_2^(100)C_4+^(100)C_4^(100)C_6++^(100)C_(98)^(100)C_(100)=1/2[^(200)C_(98)-^(100)C_(49)]dot`

2 Answers 5 Views

A `0.6 xx 10^(-3) W` laser is aimed at the Moon. The wavelength of emitted light is 600 nm and the laser beam spreads out of the source at a divergenc

2 Answers 10 Views

An eye-piece consists of a concave lens of focal length 2f and a convex lens of focal length 3f separted by a distance `(f)/(2)`. They are of the same

2 Answers 7 Views

Calculate the focal length of a convex lens of crown glass of dispersive power 0.012 and concave lens of dispersive power 0.020 that from an achromati

2 Answers 8 Views

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

2 Answers 4 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

2 Answers 5 Views

An object is placed `12 cm` to the left of a diverging lens of focal length `-6.0 cm.` A converging lens with a focal length of `12.0 cm` is placed at

2 Answers 6 Views

A compound lens has been formed by joinined a convex and a concave lens, each of focal length 30 cm. what is the focal length of the combination? What

2 Answers 5 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

2 Answers 4 Views

If first wave of feminism was focused on Right to vote, the second wave of feminism was focused on

2 Answers 5 Views

Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - `2.87xx10^(-10)m^(2),3.48xx10^(8)Wm^(-2)`

5 views Answered 2023-02-05 15:29