Dual Nature of Matter and Radiation (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics): Questions 1 - 3 of 16

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 250 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 200.00 or

Question number: 1

» Dual Nature of Matter and Radiation » Black-Body Radiation

Appeared in Year: 2011

MCQ▾

Question

The total radiative power emitted by spherical blackbody with radius R and temperature T is P. If the radius is doubled and the temperature is halved then the radiative power will be

Choices

Choice (4) Response
a.

4P

b.

P2

c.

2P

d.

P4

Question number: 2

» Dual Nature of Matter and Radiation » Black-Body Radiation

Appeared in Year: 2012

MCQ▾

Question

The total energy of a black body radiation source is collected for five minutes and used to heat water. The temperature of the water increases from 10.00C to 11.00C. The absolute temperature of the black body is doubled and its surface area halved and the experiment repeated for the same time. Which of the following statements would be most nearly correct?

Choices

Choice (4) Response
a.

The temperature of the water would increase from 10.00C to a final temperature of 140C

b.

The temperature of the water would increase from 10.00C to a final temperature of 180C

c.

The temperature of the water would increase from 10.00C to a final temperature of 120C

d.

The temperature of the water would increase from 10.00C to a final temperature of 110C

Question number: 3

» Dual Nature of Matter and Radiation » Einstein's Photoelectric Equation

Appeared in Year: 2011

MCQ▾

Question

Due to transitions among its first three energy levels, hydro genic atom emits radiation at three discrete wavelengths λ1, λ2, and λ3 (λ1<λ2<λ3) . Then

Choices

Choice (4) Response
a.

1λ1=1λ2+1λ3

b.

1λ1+1λ2=1λ3

c.

λ1+λ2=λ3

d.

λ1=λ2+λ3

Sign In