A 50 watt bulb emits monochromatic red light of wavelength of

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A 50 watt bulb emits monochromatic red light of wavelength of $795 nm$ . The number of photons emitted per second by the bulb is $x \times 1 0^{20}$ . The value of $x$ is ____ (Nearest integer)
[Given : $h = 6.63 \times 1 0^{- 34} Js$ and $c = 3.0 \times 1 0^{8} ms^{- 1}$ ]

Views: 7,066 students

Updated on: Jan 6, 2023

Exam:

JEE Mains 2021 Sep 1 Shift 2

Text solutionVerified

Power

= 120 J / sec

E = n [\frac{h c}{λ}] 120 = n [\frac{120 \times 920 \times 1 0 ^{- 9}}{6.62 \times 1 0 ^{- 34} \times 3 \times 1 0 ^{8}}] = 5558.9 \times 1 0^{17} = 5.5589 \times 1 0^{20}

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Owen Discussed

A 50 watt bulb emits monochromatic red light of wavelength of

795 nm

. The number of photons emitted per second by the bulb is

x \times 1 0^{20}

. The value of

x

is ____ (Nearest integer)
[Given :

h = 6.63 \times 1 0^{- 34} Js

and

c = 3.0 \times 1 0^{8} ms^{- 1}

]

10 mins ago

Discuss this question LIVE

10 mins ago

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Question Text	A 50 watt bulb emits monochromatic red light of wavelength of $795 nm$ . The number of photons emitted per second by the bulb is $x \times 1 0^{20}$ . The value of $x$ is ____ (Nearest integer) [Given : $h = 6.63 \times 1 0^{- 34} Js$ and $c = 3.0 \times 1 0^{8} ms^{- 1}$ ]
Updated On	Jan 6, 2023
Topic	Structure of Atom
Subject	Chemistry
Class	Class 11
Answer Type	Text solution:1 Video solution: 7
Upvotes	679
Avg. Video Duration	8 min

A 50 watt bulb emits monochromatic red light of wavelength of $795 nm$ . The number of photons emitted per second by the bulb is $x \times 1 0^{20}$ . The value of $x$ is ____ (Nearest integer)
[Given : $h = 6.63 \times 1 0^{- 34} Js$ and $c = 3.0 \times 1 0^{8} ms^{- 1}$ ]

Text solutionVerified

Video solutions (7)

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A 50 watt bulb emits monochromatic red light of wavelength of 795 nm . The number of photons emitted per second by the bulb is x×1020 . The value of x is ____ (Nearest integer)[Given : h=6.63×10−34Js and c=3.0×108 ms−1 ]

Text solutionVerified

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A 50 watt bulb emits monochromatic red light of wavelength of $795 nm$ . The number of photons emitted per second by the bulb is $x \times 1 0^{20}$ . The value of $x$ is ____ (Nearest integer)
[Given : $h = 6.63 \times 1 0^{- 34} Js$ and $c = 3.0 \times 1 0^{8} ms^{- 1}$ ]